InternalServerError: Unknown server error occurred when processing this request - java
I receive sporadic the follow error with the Azure CosmosDB emulator on calling CosmosDatabase.createContainerIfNotExists.
Also if the error message contains many helpless details there is nothing to understand the cause. How can I get more information about the error from the Azure CosmosDB emulator?
What can be the cause of the error? The count of existing container if the error occur is approximate 70 to 130. This should be no problem for the limit of 250 containers.
What is the best handling of the error?
{"ClassName":"CosmosException","userAgent":"azsdk-java-cosmos/4.17.0 Linux/5.4.0-84-generic JRE/11.0.12",
"statusCode":500,"resourceAddress":"https://10.10.1.150:8081/dbs/test/colls",
"error":"{\"code\":\"InternalServerError\",\"message\":\"Unknown server error occurred when processing this request.\\r\\nActivityId: 70bc2604-9e3c-4093-ad46-16bcc069a243, Microsoft.Azure.Documents.Common/2.14.0,
StatusCode: InternalServerError\",\"additionalErrorInfo\":null}",
"innerErrorMessage":"Unknown server error occurred when processing this request.\r\nActivityId: 70bc2604-9e3c-4093-ad46-16bcc069a243, Microsoft.Azure.Documents.Common/2.14.0,
StatusCode: InternalServerError","causeInfo":null,"responseHeaders":"{Transfer-Encoding=chunked, Server=Microsoft-HTTPAPI/2.0, Access-Control-Allow-Origin=, Access-Control-Allow-Credentials=true, x-ms-gatewayversion=version=2.14.0, Date=Fri, 03 Dec 2021 03:23:08 GMT, x-ms-activity-id=70bc2604-9e3c-4093-ad46-16bcc069a243, Content-Type=application/json}","requestHeaders":"[Accept=application/json, x-ms-date=Fri, 03 Dec 2021 03:23:08 GMT, Content-Type=application/json]",
"cosmosDiagnostics":{"userAgent":"azsdk-java-cosmos/4.17.0 Linux/5.4.0-84-generic JRE/11.0.12",
"requestLatencyInMs":519,"requestStartTimeUTC":"2021-12-03T03:23:08.615098Z","requestEndTimeUTC":"2021-12-03T03:23:09.134243Z","responseStatisticsList":[],"supplementalResponseStatisticsList":[],"addressResolutionStatistics":{},"regionsContacted":["https://10.10.1.150:8081/"],
"retryContext":{"statusAndSubStatusCodes":null,"retryLatency":0,"retryCount":0},"metadataDiagnosticsContext":{"metadataDiagnosticList":null},"serializationDiagnosticsContext":{"serializationDiagnosticsList":[{"serializationType":"CONTAINER_SERIALIZATION","startTimeUTC":"2021-12-03T03:23:08.615202Z","endTimeUTC":"2021-12-03T03:23:08.615249Z","durationInMicroSec":47}]},
"gatewayStatistics":{"sessionToken":null,"operationType":"Create","resourceType":"DocumentCollection","statusCode":500,"subStatusCode":0,"requestCharge":null,"requestTimeline":[{"eventName":"connectionCreated","startTimeUTC":"2021-12-03T03:23:08.615391Z","durationInMicroSec":235},{"eventName":"connectionConfigured","startTimeUTC":"2021-12-03T03:23:08.615626Z","durationInMicroSec":27},{"eventName":"requestSent","startTimeUTC":"2021-12-03T03:23:08.615653Z","durationInMicroSec":314},{"eventName":"transitTime","startTimeUTC":"2021-12-03T03:23:08.615967Z","durationInMicroSec":517832},{"eventName":"received","startTimeUTC":"2021-12-03T03:23:09.133799Z","durationInMicroSec":173}]},
"systemInformation":{"usedMemory":"250743 KB","availableMemory":"273545 KB","systemCpuLoad":"(2021-12-03T03:22:43.164095Z 4.0%), (2021-12-03T03:22:48.164056Z 2.6%), (2021-12-03T03:22:53.164086Z 3.3%), (2021-12-03T03:22:58.164100Z 2.6%), (2021-12-03T03:23:03.164114Z 2.1%), (2021-12-03T03:23:08.164169Z 2.1%)","availableProcessors":8},"clientCfgs":{"id":-1,"connectionMode":"DIRECT","numberOfClients":2,"connCfg":{"rntbd":"(cto:PT5S, rto:PT5S, icto:PT0S, ieto:PT1H, mcpe:130, mrpc:30, cer:false)","gw":"(cps:1000, rto:PT5S, icto:null, p:false)","other":"(ed: true, cs: false)"},"consistencyCfg":"(consistency: null, mm: true, prgns: [])"}}}
at com.azure.cosmos.BridgeInternal.createCosmosException(BridgeInternal.java:463)
at com.azure.cosmos.implementation.RxGatewayStoreModel.validateOrThrow(RxGatewayStoreModel.java:365)
at com.azure.cosmos.implementation.RxGatewayStoreModel.lambda$toDocumentServiceResponse$0(RxGatewayStoreModel.java:294)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:106)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:199)
at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:118)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:220)
at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onNext(FluxDoFinally.java:130)
at reactor.core.publisher.FluxHandleFuseable$HandleFuseableSubscriber.onNext(FluxHandleFuseable.java:184)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815)
at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:128)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:259)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:401)
at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:416)
at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:470)
at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:685)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1368)
at io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795)
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:829)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99)
at reactor.core.publisher.Mono.block(Mono.java:1703)
at com.azure.cosmos.CosmosDatabase.blockContainerResponse(CosmosDatabase.java:291)
at com.azure.cosmos.CosmosDatabase.createContainerIfNotExists(CosmosDatabase.java:198)
For Error –
Suppressed: java.lang.Exception: #block terminated with an error
If you face block terminated error. you should create a new connection while making an api call. This would solve the issue.
I would suggest you raise support ticket
You can also refer to this GitHub repo for CosmosDatabase.createContainerIfNotExists
I solved the problem by already trying to create the container when initializing my objects at startup. I ignore an error at this point. This initialization is largely sequential.
When using the container a while later, I then try again if it failed before. This reduces the startup time of the application a bit, but the error no longer occurred.
Related
Stomp gives TCP connection failure and disconnection error
I have been using STOMP and sockjs for some time now, but the error below happens at times.
12:57:30.976 [48] [tcp-client-loop-nio-4] INFO org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler - TCP connection failure in session w6s21o5d: failed to forward DISCONNECT session=w6s21o5d
reactor.netty.channel.AbortedException: io.netty.channel.StacklessClosedChannelException
at reactor.netty.FutureMono$FutureSubscription.wrapError(FutureMono.java:186) ~[reactor-netty-core-1.0.7.jar!/:1.0.7]
at reactor.netty.FutureMono$FutureSubscription.operationComplete(FutureMono.java:177) [reactor-netty-core-1.0.7.jar!/:1.0.7]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:552) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.safeSetFailure(AbstractChannel.java:1021) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(AbstractChannel.java:882) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.write(DefaultChannelPipeline.java:1367) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.timeout.IdleStateHandler.write(IdleStateHandler.java:304) [netty-handler-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1071) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:497) [netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: io.netty.channel.StacklessClosedChannelException
The disconnection message is send from frontend as shown below before page reload.
window.addEventListener("beforeunload", function () {
client.disconnect(function () {
log("disconnect websocket..");
});
});
No logic is written in backend to handle this spring-stomp handles rest of it.
I have gone through resources in STOMP and there is still no explanation on why or exactly on what scenarios this is happening. What could be the possible reasons for this error.
Can not connect to AWS Redis Cache with spring boot
There are two nodes on AWS and I am using spring-boot 2.2.6 release.
#Bean
public LettuceConnectionFactory redisConnectionFactory( String hostname, String password) {
//List<String> nodes = Collections.singletonList(hostname+":6379");
RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration()
.clusterNode("cf-xxx11xxxx.cache.amazonaws.com",6379)
.clusterNode("cf-xxx22xxxx.cache.amazonaws.com", 6379);
redisClusterConfiguration.setPassword(password);
LettuceClientConfiguration lettuceClientConfiguration = LettuceClientConfiguration.builder().useSsl().disablePeerVerification().build();
LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory(redisClusterConfiguration, lettuceClientConfiguration);
return lettuceConnectionFactory;
}
When spring boot came up, the exception showed as following:
Caused by: io.lettuce.core.RedisException: Cannot retrieve initial cluster partitions from initial URIs [RedisURI [host='cf-xxxx11.cache.amazonaws.com', port=6379]]
at io.lettuce.core.cluster.topology.ClusterTopologyRefresh.tryFail(ClusterTopologyRefresh.java:143) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.topology.ClusterTopologyRefresh.loadViews(ClusterTopologyRefresh.java:105) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.doLoadPartitions(RedisClusterClient.java:865) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.loadPartitions(RedisClusterClient.java:838) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.initializePartitions(RedisClusterClient.java:813) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.RedisClusterClient.getPartitions(RedisClusterClient.java:823) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.data.redis.connection.lettuce.ClusterConnectionProvider.getConnectionAsync(ClusterConnectionProvider.java:92) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.data.redis.connection.lettuce.ClusterConnectionProvider.getConnectionAsync(ClusterConnectionProvider.java:40) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.data.redis.connection.lettuce.LettuceConnectionProvider.getConnection(LettuceConnectionProvider.java:53) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1197) ~[spring-data-redis-2.2.6.RELEASE.jar:2.2.6.RELEASE]
... 94 common frames omitted
Caused by: io.lettuce.core.RedisCommandExecutionException: ERR This instance has cluster support disabled
at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:135) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:108) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:120) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:111) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.cluster.topology.TimedAsyncCommand.complete(TimedAsyncCommand.java:51) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandWrapper.complete(CommandWrapper.java:59) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:654) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:614) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:565) ~[lettuce-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1486) ~[netty-handler-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1235) ~[netty-handler-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282) ~[netty-handler-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498) ~[netty-codec-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437) ~[netty-codec-4.1.48.Final.jar:4.1.48.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) ~[netty-codec-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.48.Final.jar:4.1.48.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.48.Final.jar:4.1.48.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.48.Final.jar:4.1.48.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.48.Final.jar:4.1.48.Final]
... 1 common frames omitted
Googled a lot and did not find the solution. Could it be setting SSL or TLS issue? Tried to set lettuceConnectionFactory properties but they did not work.
Make sure the redis's configuration cluster-enabled is set with value yes. In the case of AWS redis It is enabled on aws console on cluster mode configuration. This issue raises when this configuration is disabled, because os trying to connect as cluster on an instante that is not enabled to handle this.
Blocking operations in Reactive application using MongoDB reactive drivers
I am developing a REST API which is reactive, using Reactive Mongo drivers, Spring Webflux framework. All works fine when the concurrency level is below 100, however when I increase the concurrency level to 200, blockhound reports blocking calls to Mongo. I am using Mongod community version on windows, with Blockhound installed in Spring boot application and Apache bench to test the concurrent behaviour. Below is the error. This error is reported only when concurrency above 100. Any suggestions on how to resolve this error? Please note I have reported this issue with Mongodb community as well. They have informed that it may be a false positive as system may not have enough resources to create more connections. If there are no resources to create more connections, should Blockhound report as blocking? 2021-01-02 09:52:17.399 ERROR 18688 --- [reactor-http-nio-2] org.mongodb.driver.operation : Callback onResult call produced an error. reactor.blockhound.BlockingOperationError: Blocking call! jdk.internal.misc.Unsafe#park at java.base/jdk.internal.misc.Unsafe.park(Unsafe.java) at java.base/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194) at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:885) at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:917) at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1240) at java.base/java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:267) at java.base/java.util.concurrent.LinkedBlockingQueue.offer(LinkedBlockingQueue.java:409) at java.base/java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1347) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:118) at java.base/java.util.concurrent.Executors$DelegatedExecutorService.submit(Executors.java:714) at com.mongodb.internal.connection.DefaultConnectionPool.getAsync(DefaultConnectionPool.java:157) at com.mongodb.internal.connection.DefaultServer.getConnectionAsync(DefaultServer.java:105) at com.mongodb.internal.binding.AsyncClusterBinding$AsyncClusterBindingConnectionSource.getConnection(AsyncClusterBinding.java:131) at com.mongodb.internal.async.client.ClientSessionBinding$SessionBindingAsyncConnectionSource.getConnection(ClientSessionBinding.java:140) at com.mongodb.internal.operation.OperationHelper.withAsyncConnectionSource(OperationHelper.java:730) at com.mongodb.internal.operation.OperationHelper.access$200(OperationHelper.java:68) at com.mongodb.internal.operation.OperationHelper$AsyncCallableWithConnectionAndSourceCallback.onResult(OperationHelper.java:750) at com.mongodb.internal.operation.OperationHelper$AsyncCallableWithConnectionAndSourceCallback.onResult(OperationHelper.java:738) at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:48) at com.mongodb.internal.async.client.ClientSessionBinding$WrappingCallback.onResult(ClientSessionBinding.java:208) at com.mongodb.internal.async.client.ClientSessionBinding$WrappingCallback.onResult(ClientSessionBinding.java:196) at com.mongodb.internal.binding.AsyncClusterBinding$1.onResult(AsyncClusterBinding.java:105) at com.mongodb.internal.binding.AsyncClusterBinding$1.onResult(AsyncClusterBinding.java:99) at com.mongodb.internal.connection.BaseCluster$ServerSelectionRequest.onResult(BaseCluster.java:432) at com.mongodb.internal.connection.BaseCluster.handleServerSelectionRequest(BaseCluster.java:299) at com.mongodb.internal.connection.BaseCluster.selectServerAsync(BaseCluster.java:155) at com.mongodb.internal.connection.SingleServerCluster.selectServerAsync(SingleServerCluster.java:42) at com.mongodb.internal.binding.AsyncClusterBinding.getAsyncClusterBindingConnectionSource(AsyncClusterBinding.java:99) at com.mongodb.internal.binding.AsyncClusterBinding.getReadConnectionSource(AsyncClusterBinding.java:84) at com.mongodb.internal.async.client.ClientSessionBinding.getReadConnectionSource(ClientSessionBinding.java:58) at com.mongodb.internal.operation.OperationHelper.withAsyncReadConnection(OperationHelper.java:677) at com.mongodb.internal.operation.FindOperation.executeAsync(FindOperation.java:689) at com.mongodb.internal.async.client.OperationExecutorImpl$1$1.onResult(OperationExecutorImpl.java:86) at com.mongodb.internal.async.client.OperationExecutorImpl$1$1.onResult(OperationExecutorImpl.java:74) at com.mongodb.internal.async.client.OperationExecutorImpl.getReadWriteBinding(OperationExecutorImpl.java:177) at com.mongodb.internal.async.client.OperationExecutorImpl.access$200(OperationExecutorImpl.java:43) at com.mongodb.internal.async.client.OperationExecutorImpl$1.onResult(OperationExecutorImpl.java:72) at com.mongodb.internal.async.client.OperationExecutorImpl$1.onResult(OperationExecutorImpl.java:66) at com.mongodb.internal.async.client.ClientSessionHelper.createClientSession(ClientSessionHelper.java:60) at com.mongodb.internal.async.client.ClientSessionHelper.withClientSession(ClientSessionHelper.java:51) at com.mongodb.internal.async.client.OperationExecutorImpl.execute(OperationExecutorImpl.java:66) at com.mongodb.internal.async.client.AsyncMongoIterableImpl.batchCursor(AsyncMongoIterableImpl.java:167) at com.mongodb.reactivestreams.client.internal.MongoIterableSubscription.requestInitialData(MongoIterableSubscription.java:45) at com.mongodb.reactivestreams.client.internal.AbstractSubscription.tryRequestInitialData(AbstractSubscription.java:177) at com.mongodb.reactivestreams.client.internal.AbstractSubscription.request(AbstractSubscription.java:100) at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:235) at com.mongodb.reactivestreams.client.internal.MongoIterableSubscription.<init>(MongoIterableSubscription.java:39) at com.mongodb.reactivestreams.client.internal.Publishers.lambda$publish$0(Publishers.java:43) at com.mongodb.reactivestreams.client.internal.FindPublisherImpl.subscribe(FindPublisherImpl.java:175) at reactor.core.publisher.FluxSource.subscribe(FluxSource.java:66) at reactor.core.publisher.Flux.subscribe(Flux.java:8147) at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:195) at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:120) at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoSupplier.subscribe(MonoSupplier.java:61) at reactor.core.publisher.Mono.subscribe(Mono.java:4046) at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:172) at reactor.core.publisher.FluxFilter$FilterSubscriber.onError(FluxFilter.java:157) at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onError(FluxMap.java:259) at reactor.core.publisher.Operators.error(Operators.java:196) at reactor.core.publisher.MonoError.subscribe(MonoError.java:52) at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55) at reactor.core.publisher.Flux.subscribe(Flux.java:8147) at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:199) at reactor.core.publisher.MonoFlatMapMany.subscribeOrReturn(MonoFlatMapMany.java:49) at reactor.core.publisher.Flux.subscribe(Flux.java:8133) at reactor.core.publisher.FluxUsingWhen.subscribe(FluxUsingWhen.java:93) at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249) at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:210) at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:210) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoIgnoreThen$ThenAcceptInner.onNext(MonoIgnoreThen.java:305) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:251) at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:336) at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:180) at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:99) at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151) at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107) at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:295) at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337) at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1784) at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:159) at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:259) at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:383) at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:396) at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:540) at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:252) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.base/java.lang.Thread.run(Thread.java:834)
There is a common exception that mongo may kick out when its own query request queue gets too large. This happens because webflux is efficient at passing through requests and the mongo driver chokes, on the database side. The back pressure isn't handled across the connection. Not sure without seeing code but that could be one thing to investigate. You may also be making a simple mistake in code and actually calling blocking code in your web handlers.
Spring cloud gateway AbstractErrorWebExceptionHandler
I've created global route for all incoming requests and face with AbstractErrorWebExceptionHandler.
My application.yml
spring:
cloud:
gateway:
routes:
- id: global_route
uri: http://localhost:8082
predicates:
- Path=/**
filters:
- RewritePath=/service(?<segment>/?.*), $\{segment}
- id: authorization_route
uri: http://localhost:8082
predicates:
- Path=/key/login
filters:
- JWTFilter=RSA512,HS512
Logs when I run the application:
2020-10-28 09:31:58.606 ERROR 9184 --- [ctor-http-nio-1] a.w.r.e.AbstractErrorWebExceptionHandler : [6d5d3da0] 500 Server Error for HTTP GET "/keyfd"
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.0.0.1:8082
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP GET "/keyfd" [ExceptionHandlingWebHandler]
Stack trace:
Caused by: java.net.ConnectException: Connection refused: no further information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[na:1.8.0_221]
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[na:1.8.0_221]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.52.Final.jar:4.1.52.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.52.Final.jar:4.1.52.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.52.Final.jar:4.1.52.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_221]
Thank you for help.
The error cause is that I specified uri for spring cloud gateway the same as uri I'm running this application. So application started on localhost:8082 and the uri for route was localhost:8082.
Java / No campaign available for requested device model
I think that this following error message might be specific to the project that I am working out upon, but, by any chance does any one know what might be the cause of this following error message and how to deal with it? post DynamicAdRequest failed java.util.NoSuchElementException: Sequence contains no elements at rx.internal.operators.OperatorSingle$ParentSubscriber.onCompleted(OperatorSingle.java:115) at rx.observers.SerializedObserver.onCompleted(SerializedObserver.java:176) at rx.observers.SerializedSubscriber.onCompleted(SerializedSubscriber.java:64) at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:246) at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onCompleted(OnSubscribeConcatMap.java:169) at rx.internal.operators.OnSubscribeMap$MapSubscriber.onCompleted(OnSubscribeMap.java:97) at rx.observers.SerializedObserver.onCompleted(SerializedObserver.java:176) at rx.observers.SerializedSubscriber.onCompleted(SerializedSubscriber.java:64) at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:246) at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onCompleted(OnSubscribeConcatMap.java:169) at rx.internal.operators.OnSubscribeFromArray$FromArrayProducer.slowPath(OnSubscribeFromArray.java:106) at rx.internal.operators.OnSubscribeFromArray$FromArrayProducer.request(OnSubscribeFromArray.java:63) at rx.Subscriber.setProducer(Subscriber.java:211) at rx.internal.operators.OnSubscribeFromArray.call(OnSubscribeFromArray.java:32) at rx.internal.operators.OnSubscribeFromArray.call(OnSubscribeFromArray.java:24) at rx.Observable.unsafeSubscribe(Observable.java:10256) at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) at rx.Observable.unsafeSubscribe(Observable.java:10256) at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48) at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33) at rx.Observable.unsafeSubscribe(Observable.java:10256) at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) at rx.Observable.subscribe(Observable.java:10352) at rx.Observable.subscribe(Observable.java:10319) at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:443) at rx.observables.BlockingObservable.single(BlockingObservable.java:340) at com.samsung.dsp.dbhandler.SqlConnectionProvider.getDeviceGroup(SqlConnectionProvider.java:114) at com.samsung.dsp.networkrequesthandler.RequestHandlerVerticle.dynamicAdRequestHandler(RequestHandlerVerticle.java:135) at io.vertx.reactivex.ext.web.api.contract.openapi3.OpenAPI3RouterFactory$6.handle(OpenAPI3RouterFactory.java:241) at io.vertx.reactivex.ext.web.api.contract.openapi3.OpenAPI3RouterFactory$6.handle(OpenAPI3RouterFactory.java:239) at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:219) at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:85) at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133) at io.vertx.ext.web.api.validation.impl.BaseValidationHandler.handle(BaseValidationHandler.java:89) at io.vertx.ext.web.api.validation.impl.BaseValidationHandler.handle(BaseValidationHandler.java:19) at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:219) at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:85) at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133) at io.vertx.ext.web.handler.impl.ResponseContentTypeHandlerImpl.handle(ResponseContentTypeHandlerImpl.java:54) at io.vertx.ext.web.handler.impl.ResponseContentTypeHandlerImpl.handle(ResponseContentTypeHandlerImpl.java:28) at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:219) at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:120) at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133) at io.vertx.ext.web.handler.impl.BodyHandlerImpl$BHandler.doEnd(BodyHandlerImpl.java:231) at io.vertx.ext.web.handler.impl.BodyHandlerImpl$BHandler.end(BodyHandlerImpl.java:211) at io.vertx.ext.web.handler.impl.BodyHandlerImpl.lambda$handle$0(BodyHandlerImpl.java:74) at io.vertx.core.http.impl.HttpServerRequestImpl.handleEnd(HttpServerRequestImpl.java:417) at io.vertx.core.http.impl.Http1xServerConnection.handleEnd(Http1xServerConnection.java:482) at io.vertx.core.http.impl.Http1xServerConnection.handleContent(Http1xServerConnection.java:477) at io.vertx.core.http.impl.Http1xServerConnection.processMessage(Http1xServerConnection.java:458) at io.vertx.core.http.impl.Http1xServerConnection.handleMessage(Http1xServerConnection.java:144) at io.vertx.core.http.impl.HttpServerImpl$ServerHandlerWithWebSockets.handleMessage(HttpServerImpl.java:712) at io.vertx.core.http.impl.HttpServerImpl$ServerHandlerWithWebSockets.handleMessage(HttpServerImpl.java:619) at io.vertx.core.net.impl.VertxHandler.lambda$channelRead$1(VertxHandler.java:146) at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:337) at io.vertx.core.impl.ContextImpl.executeFromIO(ContextImpl.java:195) at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:144) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1359) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:935) at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:141) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Unknown Source)
You are calling Observable.concatMap() with an empty list of observables. Without seeing your code, we can't narrow it down any further.