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MYSQL JDBC throws ava.sql.SQLNonTransientConnectionException: Default algorithm definitions for TrustManager and/or KeyManager are invalid

Mysql JDBC driver throws following exceptions with useSSL=true Properties in fips enables ENV.
The follwing is code for get connection:
Properties props = new Properties();
props.setProperty("user", user_);
props.setProperty("password", password_);
if (dbUurl_.contains("mysql")) {
props.put("useSSL", "true");
props.put("verifyServerCertificate", "false");
}
return DriverManager.getConnection(dbUurl_, props);
I get the following exception:
java.sql.SQLNonTransientConnectionException: Default algorithm definitions for TrustManager and/or KeyManager are invalid. Check java security properties file.
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:70)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:828)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:448)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:241)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:189)
at com.hp.usage.db.migration.DBMigrator.getConnection(DBMigrator.java:235)
at com.hp.usage.db.migration.DBMigrator.connect(DBMigrator.java:76)
at com.hp.usage.db.migration.DBMigratorHandler.doConnect(DBMigratorHandler.java:410)
at com.hp.usage.db.migration.DBMigratorHandler.execute(DBMigratorHandler.java:71)
at com.hp.usage.console.framework.CommandContextImpl.executeInternal(CommandContextImpl.java:274)
at com.hp.usage.console.framework.ApplicationContextImpl.executeBatch(ApplicationContextImpl.java:409)
at com.hp.usage.console.framework.ApplicationContextImpl.executeInternal(ApplicationContextImpl.java:310)
at com.hp.usage.console.framework.ApplicationContextImpl.executeInteractive(ApplicationContextImpl.java:227)
at com.hp.usage.console.spring.Main.executeInteractive(Main.java:96)
at com.hp.usage.console.spring.Main.executeCli(Main.java:69)
at com.hp.siu.loader.Command.executeCLI(Command.java:159)
at com.hp.siu.loader.Command.execute(Command.java:103)
at com.hp.siu.loader.CommandLaunch.run(CommandLaunch.java:64)
at com.hp.siu.loader.CommandLaunch.run(CommandLaunch.java:102)
at com.hp.siu.loader.CommandLaunch.main(CommandLaunch.java:108)
Caused by: com.mysql.cj.exceptions.SSLParamsException: Default algorithm definitions for TrustManager and/or KeyManager are invalid. Check java security properties file.
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.protocol.ExportControlled.getSSLContext(ExportControlled.java:546)
at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:333)
at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:191)
at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:101)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:369)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:205)
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1433)
at com.mysql.cj.NativeSession.connect(NativeSession.java:133)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:948)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:818)
... 20 more
**Caused by: java.security.NoSuchAlgorithmException: SunX509 KeyManagerFactory not available**
at java.base/sun.security.jca.GetInstance.getInstance(GetInstance.java:159)
at java.base/javax.net.ssl.KeyManagerFactory.getInstance(KeyManagerFactory.java:148)
at com.mysql.cj.protocol.ExportControlled.getSSLContext(ExportControlled.java:544)
... 29 more
How can I fix this exception?

Why is my Springboot application not starting up?

I bootstrapped the springboot application with JHipster but I have not been able to get it start up . It says build success but won't start up on a server . There is an embedded tomcat server added to the POM.XML , what could be wrong ?
Caused by: java.lang.IllegalArgumentException: Unable to resolve Configuration with the provided Issuer of "http://localhost:9080/auth/realms/jhipster"
at org.springframework.security.oauth2.client.registration.ClientRegistrations.getBuilder(ClientRegistrations.java:221)
at org.springframework.security.oauth2.client.registration.ClientRegistrations.fromIssuerLocation(ClientRegistrations.java:145)
at org.springframework.boot.autoconfigure.security.oauth2.client.OAuth2ClientPropertiesRegistrationAdapter.getBuilderFromIssuerIfPossible(OAuth2ClientPropertiesRegistrationAdapter.java:83)
at org.springframework.boot.autoconfigure.security.oauth2.client.OAuth2ClientPropertiesRegistrationAdapter.getClientRegistration(OAuth2ClientPropertiesRegistrationAdapter.java:59)
at org.springframework.boot.autoconfigure.security.oauth2.client.OAuth2ClientPropertiesRegistrationAdapter.lambda$getClientRegistrations$0(OAuth2ClientPropertiesRegistrationAdapter.java:53)
at java.base/java.util.HashMap.forEach(HashMap.java:1425)
at org.springframework.boot.autoconfigure.security.oauth2.client.OAuth2ClientPropertiesRegistrationAdapter.getClientRegistrations(OAuth2ClientPropertiesRegistrationAdapter.java:52)
at org.springframework.boot.autoconfigure.security.oauth2.client.servlet.OAuth2ClientRegistrationRepositoryConfiguration.clientRegistrationRepository(OAuth2ClientRegistrationRepositoryConfiguration.java:49)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
... 118 common frames omitted
Caused by: org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost:9080/auth/realms/jhipster/.well-known/openid-configuration": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:785)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:670)
at org.springframework.security.oauth2.client.registration.ClientRegistrations.lambda$oidc$0(ClientRegistrations.java:156)
at org.springframework.security.oauth2.client.registration.ClientRegistrations.getBuilder(ClientRegistrations.java:209)
... 130 common frames omitted
Caused by: java.net.ConnectException: Connection refused: connect
at java.base/sun.nio.ch.Net.connect0(Native Method)
at java.base/sun.nio.ch.Net.connect(Net.java:574)
at java.base/sun.nio.ch.Net.connect(Net.java:563)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:588)
at java.base/java.net.Socket.connect(Socket.java:648)
at java.base/java.net.Socket.connect(Socket.java:597)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569)
at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:341)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:362)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1261)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1194)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1082)
at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1016)
at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:76)
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:776)
... 133 common frames omitted

Ensure that keycloak is started before running the springboot app because jhispter provides ready to use keycloak config. The app tries to reach keycloak at localhost:9080.
If you have docker and docker-compose installed you can use the provided docker-compose configuration and start keycloak via docker-compose -f src/main/docker/keycloak.yml up
If you want to start it manually you need to make sure to setup the jhipster realm in your keycloak instance.

You have to check 9080 port
Is it use by another process
You can do it by this command : netstat -aon
Then kill process by processor: taskkill -f /pid process_id

SMTP config and java error in ReportServer. No password supplied for PKCS#12 KeyStore

I am trying to config smtp for scheduled reports in ReportServer.
So my smtp congif:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<smtp>
<host>smtp.gmail.com</host>
<port>587</port>
<username>xxx#gmail.com</username>
<password>xxx</password>
<ssl>false</ssl>
<tls>
<enable>true</enable>
<require>false</require>
</tls>
</smtp>
<mail>
<sender>xxx#gmail.com</sender>
<forceSender>false</forceSender>
<encryptionPolicy>allow_mixed</encryptionPolicy>
</mail>
</configuration>
I tried different configurations using ssl true, port 465.
https://forum.reportserver.net/viewtopic.php?pid=2291#p2291
I also used this configuration on Knowage BI and it worked but it did not have scheduler on free version so I tried ReportServer.
Now I can't figure this error out:
java.lang.RuntimeException: javax.mail.MessagingException: Could not convert socket to TLS;
nested exception is:
java.net.SocketException: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)
at net.datenwerke.rs.scheduler.service.scheduler.mail.MailReportAction$1.handleException(MailReportAction.java:149)
at net.datenwerke.rs.core.service.mail.MailServiceImpl.sendMailSync(MailServiceImpl.java:243)
at net.datenwerke.rs.scheduler.service.scheduler.mail.MailReportAction.doExecute(MailReportAction.java:140)
at net.datenwerke.scheduler.service.scheduler.entities.AbstractAction.execute(AbstractAction.java:59)
at net.datenwerke.scheduler.service.scheduler.tasks.SchedulerTask.executeAction(SchedulerTask.java:495)
at net.datenwerke.scheduler.service.scheduler.tasks.SchedulerTask.executeActions(SchedulerTask.java:385)
at net.datenwerke.scheduler.service.scheduler.tasks.SchedulerTask.safeCall(SchedulerTask.java:209)
at net.datenwerke.scheduler.service.scheduler.tasks.SchedulerTask.call(SchedulerTask.java:101)
at net.datenwerke.scheduler.service.scheduler.tasks.SchedulerTask.call(SchedulerTask.java:1)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javax.mail.MessagingException: Could not convert socket to TLS;
nested exception is:
java.net.SocketException: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)
at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1918)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:652)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at net.datenwerke.rs.core.service.mail.MailServiceImpl.sendMailSync(MailServiceImpl.java:233)
... 11 more
Caused by: java.net.SocketException: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)
at java.base/javax.net.ssl.DefaultSSLSocketFactory.throwException(SSLSocketFactory.java:263)
at java.base/javax.net.ssl.DefaultSSLSocketFactory.createSocket(SSLSocketFactory.java:285)
at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:484)
at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1913)
... 18 more
Caused by: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)
at java.base/java.security.Provider$Service.newInstance(Provider.java:1831)
at java.base/sun.security.jca.GetInstance.getInstance(GetInstance.java:236)
at java.base/sun.security.jca.GetInstance.getInstance(GetInstance.java:164)
at java.base/javax.net.ssl.SSLContext.getInstance(SSLContext.java:168)
at java.base/javax.net.ssl.SSLContext.getDefault(SSLContext.java:99)
at java.base/javax.net.ssl.SSLSocketFactory.getDefault(SSLSocketFactory.java:123)
at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:479)
... 19 more
Caused by: java.lang.NullPointerException: No password supplied for PKCS#12 KeyStore.
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.engineLoad(Unknown Source)
at java.base/java.security.KeyStore.load(KeyStore.java:1479)
at java.base/sun.security.ssl.TrustStoreManager$TrustAnchorManager.loadKeyStore(TrustStoreManager.java:365)
at java.base/sun.security.ssl.TrustStoreManager$TrustAnchorManager.getTrustedCerts(TrustStoreManager.java:313)
at java.base/sun.security.ssl.TrustStoreManager.getTrustedCerts(TrustStoreManager.java:55)
at java.base/sun.security.ssl.TrustManagerFactoryImpl.engineInit(TrustManagerFactoryImpl.java:49)
at java.base/javax.net.ssl.TrustManagerFactory.init(TrustManagerFactory.java:278)
at java.base/sun.security.ssl.SSLContextImpl$DefaultManagersHolder.getTrustManagers(SSLContextImpl.java:1052)
at java.base/sun.security.ssl.SSLContextImpl$DefaultManagersHolder.<clinit>(SSLContextImpl.java:1022)
at java.base/sun.security.ssl.SSLContextImpl$DefaultSSLContext.<init>(SSLContextImpl.java:1197)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.base/java.security.Provider.newInstanceUtil(Provider.java:153)
at java.base/java.security.Provider$Service.newInstance(Provider.java:1824)
at java.base/sun.security.jca.GetInstance.getInstance(GetInstance.java:236)
at java.base/sun.security.jca.GetInstance.getInstance(GetInstance.java:164)
at java.base/javax.net.ssl.SSLContext.getInstance(SSLContext.java:168)
at java.base/javax.net.ssl.SSLContext.getDefault(SSLContext.java:99)
at java.base/javax.net.ssl.SSLSocketFactory.getDefault(SSLSocketFactory.java:123)
at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:479)
at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1913)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:652)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at net.datenwerke.rs.core.service.mail.MailServiceImpl.sendMailSync(MailServiceImpl.java:233)
at net.datenwerke.rs.core.service.mail.MailServiceImpl$1.run(MailServiceImpl.java:266)
... 3 more
So I read a few topics, maybe I am missing certificate, I am not sure. Kind of fresh here.
Additional information:
Java jdk_1.8.0_202
Windows 7
Thanks for the help.

I solved this issue myself.
I checked log files and found a warning message: "server certificate does NOT include an ID which matches the server name".
After some digging opened openssl.exe. It gave an error it cannot find ssi.conf file, wrong path.
Fixed it.
Scheduler and mailing works fine now. :)

Couldn't start gremlin server from JanusGraps (GraphFactory warning)

I try to start JanusGraph and I have a problem with TinkerPop gremlin server. I try both "release (0.1.1)" and "from source (0.2.0)" versions.
When I run /bin/janusgraph.sh start there is no error but I can't connect to gremlin with my application.
When I start TinkerPop version downloaded from Apache site I have no problem with connection. I think that the problem is with a config file. The Apache version uses tinkergraph-empty.properties, the JanusGraph version: janusgraph-cassandra-es-server.properties (Of course, I want to use Cassandra).
A result of executing gremlin-server.sh with Cassandra config don't return any errors but returns warnings:
718 [main] WARN org.apache.tinkerpop.gremlin.server.GremlinServer - Graph [graph] configured at [conf/gremlin-server/janusgraph-cassandra-es-server.properties] could not be instantiated and will not be available in Gremlin Server. GraphFactory message: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:82)
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:70)
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:104)
at org.apache.tinkerpop.gremlin.server.GraphManager.lambda$new$0(GraphManager.java:55)
at java.util.LinkedHashMap$LinkedEntrySet.forEach(LinkedHashMap.java:671)
at org.apache.tinkerpop.gremlin.server.GraphManager.<init>(GraphManager.java:53)
at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.<init>(ServerGremlinExecutor.java:83)
at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:110)
at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.java:344)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:78)
... 8 more
Caused by: java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager
at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:69)
at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:477)
at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:409)
at org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1353)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:107)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:87)
... 13 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:58)
... 18 more
Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Temporary failure in storage backend
at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:219)
at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.<init>(CassandraThriftStoreManager.java:198)
... 23 more
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused (Connection refused)
at org.apache.thrift.transport.TSocket.open(TSocket.java:185)
at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81)
at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeRawConnection(CTConnectionFactory.java:102)
at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:66)
at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:35)
at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1220)
at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:216)
... 24 more
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.thrift.transport.TSocket.open(TSocket.java:180)
... 30 more
How can I start JanusGraph with Cassanda without warnings?

There is a problem with starting Cassandra which you one observe by running:
bin/nodetool enablethrift
as #Ashraful Islam suggested.
One need to uncomment following line(I set address to localhost) in conf/cassandra/cassandra-env.sh :
JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=127.0.0.1"

Enable Thrift server of Cassandra
Use the below command to enable thrift in cassandra
nodetool enablethrift

Commons Email did not connect to correct host

I tried to connect to a remote mail server but somehow commons email/JavaMail always attempt to connect to localhost. Why???
Email email = new SimpleEmail();
email.setHostName("mailserver.com");
email.setSentDate(new Date());
email.setAuthentication("admin#mailserver.com", "password");
email.setSubject("testing using simple mail");
email.setMsg("test email");
email.setFrom("*******#gmail.com");
email.addTo("*****#gmail.com");
email.setDebug(true);
email.send();
I always get the following exceptions:
Exception in thread "main" org.apache.commons.mail.EmailException: Sending the email to the following server failed : ********:25
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1242)
at org.apache.commons.mail.Email.send(Email.java:1267)
at MyJasperService.main(MyJasperService.java:219)
Caused by: javax.mail.SendFailedException: Send failure (javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25 (java.net.ConnectException: Connection refused: connect))
at javax.mail.Transport.send(Transport.java:163)
at javax.mail.Transport.send(Transport.java:48)
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232)
... 2 more
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25 (java.net.ConnectException: Connection refused: connect)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1934)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638)
at javax.mail.Service.connect(Service.java:254)
at javax.mail.Service.connect(Service.java:85)
at javax.mail.Service.connect(Service.java:70)
at javax.mail.Transport.send(Transport.java:94)
... 4 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:337)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:198)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:288)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900)
... 9 more

I seem to remember that there was a problem in one of the javamail releases from Sun/Oracle.
Which version of javamail (i.e. mail.jar) and which version of commons-email are you using?
Maybe it works if you upgrade to the latest version of both.