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With Java 11 RMI calls Slows

We have Java application with client Server architecture where client and server communicate with the help of RMI connection.
We have currently used Java 8 it working properly and respond quickly.
But we now planning to move on the Java 11 here also application working properly but comparatively slow as compare to java 8
we took the RMI logs where I can see sun.rmi.transport.DGCImpl_Stub dirty class taking time in Java 11.
Java 11 RMI logs
loadClass FINE: main: name = "java.rmi.server.UID", codebase = "",
defaultLoader =
jdk.internal.loader.ClassLoaders$AppClassLoader#4b85612c Nov 21, 2018
7:25:12 PM java.rmi.server.RMIClassLoader$2 loadClass FINER: main:
class "java.rmi.server.UID" found via defaultLoader, defined by null
Nov 21, 2018 7:25:12 PM sun.rmi.transport.DGCImpl_Stub dirty FINE:
main: free connection (reuse = true) Nov 21, 2018 7:27:31 PM
java.rmi.server.RemoteObjectInvocationHandler$MethodToHash_Maps$1 get
Java 8 RMI logs
FINE: main: name = "[B", codebase = "", defaultLoader =
sun.misc.Launcher$AppClassLoader#d716361 Nov 21, 2018 7:39:29 PM
sun.rmi.server.LoaderHandler loadClass FINER: main: class "[B" found
via defaultLoader, defined by null Nov 21, 2018 7:39:29 PM
sun.rmi.server.LoaderHandler loadClass FINE: main: name =
"java.rmi.server.UID", codebase = "", defaultLoader =
sun.misc.Launcher$AppClassLoader#d716361 Nov 21, 2018 7:39:29 PM
sun.rmi.server.LoaderHandler loadClass FINER: main: class
"java.rmi.server.UID" found via defaultLoader, defined by null Nov 21,
2018 7:39:29 PM sun.rmi.server.UnicastRef done FINE: main: free
connection (reuse = true) Nov 21, 2018 7:39:30 PM sun.rmi.server.Util
computeMethodHash

How to enable FULL Logging with Ganymed SSH-2

I am developing a java application that executes ssh commands using Ganymed SSH-2
I need to produce full logs for each sequence of commands, e.g. zip file transfer, unzipping, zipping etc..
Having searched the source code for ch.ethz.ssh2.log.Logger i can set the boolean public static volatile boolean enabled = false; to true
this provides the following output
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: kex_algo=diffie-hellman-group-exchange-sha1
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: server_host_key_algo=ssh-rsa
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: enc_algo_client_to_server=aes128-ctr
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: enc_algo_server_to_client=aes128-ctr
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: mac_algo_client_to_server=hmac-sha1-96
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: mac_algo_server_to_client=hmac-sha1-96
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: comp_algo_client_to_server=none
Mar 05, 2015 10:17:25 AM ch.ethz.ssh2.log.Logger info
INFO: comp_algo_server_to_client=none
However I also require ALL level logging for command execution including file transfers.
How do i configure the Logger to produce all the information available?

A little late answer but maybe someone still needs this info.
I managed to get the debug statements visible like this:
public void enableFineLogging() {
try {
ch.ethz.ssh2.log.Logger.enabled = true;
String name = "myDynamicFileNamePart";
FileHandler fileHandler = new FileHandler("./logs/"
+ name + "_SFTP.log", 10000000, 1000, true);
fileHandler.setLevel(Level.FINE);
fileHandler.setFormatter(new SimpleFormatter());
final Logger app = Logger.getLogger("ch.ethz");
app.setLevel(Level.FINE);
app.addHandler(fileHandler);
app.setUseParentHandlers(false);
} catch (Exception e) {
// Catchalog
}
}
With result in file with:
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter info
INFO: Client identity string: SSH-2.0-SSHJ_0.19.1
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter info
INFO: Server identity string: SSH-2.0-OpenSSH_6.6.1
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter debug
FINE: Setting <> to null
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter debug
FINE: Sending SSH_MSG_KEXINIT
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter debug
FINE: Setting <> to SOME
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter debug
FINE: Awaiting <>
marras 15, 2017 12:16:56 IP. org.slf4j.impl.JCLLoggerAdapter debug
FINE: Received SSH_MSG_KEXINIT
Use ConsoleHandler if you wish logs in console.
Also closing the log file needs to be considered with fileHandler.close() after you quit logging.
Tune the log level by choosing from SEVERE, WARNING, INFO, CONFIG, FINE, FINER, FINEST, ALL

Starting 2 hazelcast instances synchronously on a single machine (with hazelcast.initial.min.cluster.size=2)

How can I configure Hazelcast (optimally the version I currently use: 3.1.2) to run 2 hazelcast instances on a single machine, and block the first instance during startup until both instances are present?
hazelcast.initial.min.cluster.size
The blocking behavior described above can be implemented with the help of hazelcast.initial.min.cluster.size when running both instances on different machines: With the configuration:
Config cfg = new Config();
cfg.setProperty("hazelcast.initial.min.cluster.size",
Integer.toString(minimumInitialMembersInHazelCluster));
cfg.getGroupConfig().setName(clusterName);
hazelInst = Hazelcast.newHazelcastInstance(cfg);
run on different machines, I get the output
Apr 15, 2014 9:31:39 AM com.hazelcast.instance.DefaultAddressPicker
INFO: Prefer IPv4 stack is true.
Apr 15, 2014 9:31:39 AM com.hazelcast.instance.DefaultAddressPicker
INFO: Picked Address[192.168.31.105]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true
Apr 15, 2014 9:31:40 AM com.hazelcast.system
INFO: [192.168.31.105]:5701 [dev] Hazelcast Community Edition 3.1.2 (20131120) starting at Address[192.168.31.105]:5701
Apr 15, 2014 9:31:40 AM com.hazelcast.system
INFO: [192.168.31.105]:5701 [dev] Copyright (C) 2008-2013 Hazelcast.com
Apr 15, 2014 9:31:40 AM com.hazelcast.instance.Node
INFO: [192.168.31.105]:5701 [dev] Creating MulticastJoiner
Apr 15, 2014 9:31:40 AM com.hazelcast.core.LifecycleService
INFO: [192.168.31.105]:5701 [dev] Address[192.168.31.105]:5701 is STARTING
Apr 15, 2014 9:31:43 AM com.hazelcast.cluster.MulticastJoiner
INFO: [192.168.31.105]:5701 [dev]
Members [1] {
Member [192.168.31.105]:5701 this
}
Apr 15, 2014 9:31:43 AM com.hazelcast.core.LifecycleService
INFO: [192.168.31.105]:5701 [dev] Address[192.168.31.105]:5701 is STARTED
Apr 15, 2014 9:31:43 AM HazelMultiInstanceExp <init>
SEVERE: debug: joined via JoinConfig{multicastConfig=MulticastConfig [enabled=true, multicastGroup=224.2.2.3, multicastPort=54327, multicastTimeToLive=32, multicastTimeoutSeconds=2, trustedInterfaces=[]], tcpIpConfig=TcpIpConfig [enabled=false, connectionTimeoutSeconds=5, members=[], requiredMember=null], awsConfig=AwsConfig{enabled=false, region='us-east-1', securityGroupName='null', tagKey='null', tagValue='null', hostHeader='ec2.amazonaws.com', connectionTimeoutSeconds=5}} with 1 members.
Apr 15, 2014 9:31:43 AM com.hazelcast.instance.DefaultAddressPicker
INFO: Prefer IPv4 stack is true.
Apr 15, 2014 9:31:43 AM com.hazelcast.instance.DefaultAddressPicker
INFO: Picked Address[192.168.31.105]:5702, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5702], bind any local is true
Apr 15, 2014 9:31:43 AM com.hazelcast.system
INFO: [192.168.31.105]:5702 [dev] Hazelcast Community Edition 3.1.2 (20131120) starting at Address[192.168.31.105]:5702
Apr 15, 2014 9:31:43 AM com.hazelcast.system
INFO: [192.168.31.105]:5702 [dev] Copyright (C) 2008-2013 Hazelcast.com
Apr 15, 2014 9:31:43 AM com.hazelcast.instance.Node
INFO: [192.168.31.105]:5702 [dev] Creating MulticastJoiner
Apr 15, 2014 9:31:43 AM com.hazelcast.core.LifecycleService
INFO: [192.168.31.105]:5702 [dev] Address[192.168.31.105]:5702 is STARTING
Apr 15, 2014 9:31:43 AM com.hazelcast.nio.SocketConnector
INFO: [192.168.31.105]:5702 [dev] Connecting to /192.168.31.105:5701, timeout: 0, bind-any: true
Apr 15, 2014 9:31:43 AM com.hazelcast.nio.SocketAcceptor
INFO: [192.168.31.105]:5701 [dev] Accepting socket connection from /192.168.31.105:60803
Apr 15, 2014 9:31:43 AM com.hazelcast.nio.TcpIpConnectionManager
INFO: [192.168.31.105]:5702 [dev] 60803 accepted socket connection from /192.168.31.105:5701
Apr 15, 2014 9:31:43 AM com.hazelcast.nio.TcpIpConnectionManager
INFO: [192.168.31.105]:5701 [dev] 5701 accepted socket connection from /192.168.31.105:60803
Apr 15, 2014 9:31:49 AM com.hazelcast.cluster.ClusterService
INFO: [192.168.31.105]:5702 [dev]
Members [2] {
Member [192.168.31.105]:5701
Member [192.168.31.105]:5702 this
}
but run with two instances on one machine, I get
Apr 15, 2014 9:25:14 AM com.hazelcast.instance.DefaultAddressPicker
INFO: Prefer IPv4 stack is true.
Apr 15, 2014 9:25:14 AM com.hazelcast.instance.DefaultAddressPicker
INFO: Picked Address[192.168.31.105]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true
Apr 15, 2014 9:25:15 AM com.hazelcast.system
INFO: [192.168.31.105]:5701 [test3] Hazelcast Community Edition 3.1.2 (20131120) starting at Address[192.168.31.105]:5701
Apr 15, 2014 9:25:15 AM com.hazelcast.system
INFO: [192.168.31.105]:5701 [test3] Copyright (C) 2008-2013 Hazelcast.com
Apr 15, 2014 9:25:15 AM com.hazelcast.instance.Node
INFO: [192.168.31.105]:5701 [test3] Creating MulticastJoiner
Apr 15, 2014 9:25:15 AM com.hazelcast.core.LifecycleService
INFO: [192.168.31.105]:5701 [test3] Address[192.168.31.105]:5701 is STARTING
Apr 15, 2014 9:25:18 AM com.hazelcast.cluster.MulticastJoiner
INFO: [192.168.31.105]:5701 [test3]
Members [1] {
Member [192.168.31.105]:5701 this
}
Apr 15, 2014 9:25:18 AM com.hazelcast.instance.HazelcastInstanceImpl
INFO: [192.168.31.105]:5701 [test3] HazelcastInstance waiting for cluster size of 2
with the last INFO message repeated ad infinitum.
So the cluster size is the number of nodes in the cluster, not the number of hazelcast instances?
Blocking behavior on a single machine
I use cfg.setProperty("hazelcast.initial.min.cluster.size","2") so the two distributed instances start my distributed algorithm synchronously. Furthermore, it solves the problem that some hazelcast members are not found, see https://stackoverflow.com/a/20716919/750378.
So how do I avoid both problems when running on a single machine? It would be great if the cluster size would simple be the number of running hazelcast instances. Then I could keep my configuration above no matter how I deploy my two instances (on 1 or 2 machines).
Update
I have posted an issue about the cluster size at https://github.com/hazelcast/hazelcast/issues/2292.

You could use the same machine to run multiples Hazelcast instance. Under the hoods, Hazelcast binds differents ports for each instance.
Following, a simple test with two instances:
HazelcastInstance firstInstance = Hazelcast.newHazelcastInstance(new Config());
HazelcastInstance secondInstance = Hazelcast.newHazelcastInstance(new Config());
// Introducing a sample data in a map using the first instance
firstInstance.getMap("TEST_MAP").put("key", "test_value");
// Prints the value using the second instance. The result will be 'test_value'
System.out.println(secondInstance.getMap("TEST_MAP").get("key"));
When this code starts the console output is:
Members [2] {
Member [192.168.216.1]:5702
Member [192.168.216.1]:5703 this
}
As you can see, two instances were registered in the same IP but different ports.

You should start instances in different threads.
See following test:
public static void main(String[] args) throws InterruptedException {
final Config cfg = new Config();
cfg.setProperty(GroupProperties.PROP_INITIAL_MIN_CLUSTER_SIZE, "2");
Runnable runnable = new Runnable() {
public void run() {
final HazelcastInstance instance = Hazelcast.newHazelcastInstance(cfg);
IMap<Object, Object> map = instance.getMap("map");
for (int i = 0; i < 100; i++) {
map.put(i, i);
System.out.println("put:" + i);
}
}
};
Thread thread1 = new Thread(runnable);
Thread thread2 = new Thread(runnable);
thread1.start();
Thread.sleep(1000);
thread2.start();
}

Please see this thread for more information. Based on the info there, your best bet is to:
make sure you're using a configuration which allows for two machines in the cluster, on the same pc (check out the sample config file attached to that thread)
Run both machines on the same JVM (rather than firing up two separate JVMs)
Are running a fairly recent version (3.1.2 should be fine)
Starting two JVMs on the same physical machine might work sometimes if you make sure they don't have conflicting port settings, but you'll likely run into various problems (ie, i bet they won't be able to properly listen to the same multicast port). I'd advise against that approach.

How to declare Stack size in Java/Groovy (Verify Error: Stack too large)

I am getting this error:
Feb 11, 2014 10:32:34 AM org.apache.catalina.core.ApplicationContext log
Information: ContextListener: contextInitialized()
Feb 11, 2014 10:32:34 AM org.apache.catalina.core.ApplicationContext log
Information: SessionListener: contextInitialized()
Feb 11, 2014 10:32:34 AM org.apache.catalina.core.ApplicationContext log
Information: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache#6b2c636d')
Feb 11, 2014 10:43:04 AM org.apache.catalina.core.ApplicationContext log
Information: No Spring WebApplicationInitializer types detected on classpath
Feb 11, 2014 10:43:05 AM org.apache.catalina.core.ApplicationContext log
Information: Initializing Spring root WebApplicationContext
Feb 11, 2014 10:43:06 AM org.apache.catalina.core.StandardContext listenerStart
Schwerwiegend: Exception sending context initialized event to listener instance of class org.codehaus.groovy.grails.web.context.GrailsContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'grailsApplication' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.VerifyError: (class: elektrova/UserController, method: $tt__index signature: (Ljava/lang/Integer;Lorg/springframework/transaction/TransactionStatus;)Ljava/lang/Object;) Stack size too large
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.VerifyError: (class: elektrova/UserController, method: $tt__index signature: (Ljava/lang/Integer;Lorg/springframework/transaction/TransactionStatus;)Ljava/lang/Object;) Stack size too large
at java.lang.Class.forName(Class.java:270)
... 5 more
In this method:
def index(Integer max) {
params.max = Math.min(max ?: 10, 100)
if(!session.isAdmin){
Hauler haul = Hauler.get(session.haulerID)
println haul
if(params.firstName)
respond User.findAllWhere([hauler:haul,firstName:params.firstName]), model:[userInstanceCount: User.count()]
else if(params.lastName)
respond User.findAllWhere([hauler:haul,lastName:params.lastName]), model:[userInstanceCount: User.count()]
else if(params.role)
respond User.findAllWhere([hauler:haul,role:params.role]), model:[userInstanceCount: User.count()]
else
respond User.findAllByHauler(haul), model:[userInstanceCount: User.count()]
}else{
if(params.firstName){
model:[userInstanceList: User.findAllByFirstName(params.firstName),userInstanceCount: User.count()]
}else if(params.lastName)
model:[userInstanceList: User.findAllByLastName(params.lastName),userInstanceCount: User.count()]
else if(params.role)
model:[userInstanceList: User.findAllByRole(params.role),userInstanceCount: User.count()]
else
model:[userInstanceList: User.list(params),userInstanceCount: User.count()]
}
}
I found this thread, that solves the problem imho:
VerifyError: Stack size too large (what does it mean?)
but I don't quite get how to calculate and declare the stack size. And I don't understand either, why I have to declare it, since other methods don't need it.
Thanks for any help!

The problem disappeared without me changing anything, I have no idea why

Solr reports: "Connection refused" when running import

I am running a database that acts as the source for data to import into Solr. When I run the command: curl "http://localhost:8983/solr/dataimport?command=full-import&commit=true", the commit fails and the instance does a rollback. Can you help me to figure this out?
Here is the exception stack:
Jan 27, 2012 4:02:32 PM org.apache.solr.handler.dataimport.DataImporter doFullImport
INFO: Starting Full Import
Jan 27, 2012 4:02:32 PM org.apache.solr.core.SolrCore execute
INFO: [] webapp=/solr path=/dataimport params={command=full-import&commit=true} status=0 QTime=0
Jan 27, 2012 4:02:32 PM org.apache.solr.handler.dataimport.SolrWriter readIndexerProperties
INFO: Read dataimport.properties
Jan 27, 2012 4:02:32 PM org.apache.solr.update.DirectUpdateHandler2 deleteAll
INFO: [] REMOVING ALL DOCUMENTS FROM INDEX
Jan 27, 2012 4:02:32 PM org.apache.solr.core.SolrDeletionPolicy onInit
INFO: SolrDeletionPolicy.onInit: commits:num=1
commit{dir=/private/var/www/html/internsolr/solr/example/solr/data/index,segFN=segments_21,version=1320251100987,generation=73,filenames=[segments_21]
Jan 27, 2012 4:02:32 PM org.apache.solr.core.SolrDeletionPolicy updateCommits
INFO: newest commit = 1320251100987
Jan 27, 2012 4:02:32 PM org.apache.solr.handler.dataimport.JdbcDataSource$1 call
INFO: Creating a connection for entity id with URL: jdbc:mysql://localhost:3306/internshipsearch
Jan 27, 2012 4:02:32 PM org.apache.solr.common.SolrException log
SEVERE: Exception while processing: id document : SolrInputDocument[{}]:org.apache.solr.handler.dataimport.DataImportHandlerException:
Unable to execute query: select respondentid,
first_name, last_name,
cmc_email_address, graduation_year,
first_major, additional_major,
sequence, other_major,
organization_name, organization_website,
organization_desc, industry,
job_title, department,
city, state,
country, region,
internship_paid, hourly_salary,
year_undertaken, recommend_again,
employer_supervisor, employer_phone,
employer_email, not_recommended_desc,
full_time_offer, full_time_accept,
attend_summer_classes,
summer_classes_institution,
summer_classes_desc, summer_travel,
summer_travel_city, summer_travel_state,
summer_travel_country,
summer_other_activity,
summer_other_activity_desc, how_discovered,
doe_start_month, doe_start_day,
doe_end_month, doe_end_day from
interndata Processing Document # 1
at org.apache.solr.handler.dataimport.DataImportHandlerException.wrapAndThrow(DataImportHandlerException.java:72)
at org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.(JdbcDataSource.java:253)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:210)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:59)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:73)
at org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:238)
at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:596)
at org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:268)
at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:187)
at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:359)
at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:427)
at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:408)
Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection refused
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection refused
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2666)
at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:161)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:128)
at org.apache.solr.handler.dataimport.JdbcDataSource.getConnection(JdbcDataSource.java:363)
at org.apache.solr.handler.dataimport.JdbcDataSource.access$200(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:240)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:210)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:59)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:73)
at org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:238)
at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:596)
at org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:268)
at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:187)
at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:359)
at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:427)
at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:408)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2741)
at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:161)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:128)
at org.apache.solr.handler.dataimport.JdbcDataSource.getConnection(JdbcDataSource.java:363)
at org.apache.solr.handler.dataimport.JdbcDataSource.access$200(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:240)
... 11 more
Jan 27, 2012 4:02:32 PM org.apache.solr.common.SolrException log
SEVERE: Full Import failed:org.apache.solr.handler.dataimport.DataImportHandlerException:
Unable to execute query: select respondentid,
first_name, last_name,
cmc_email_address, graduation_year,
first_major, additional_major,
sequence, other_major,
organization_name, organization_website,
organization_desc, industry,
job_title, department,
city, state,
country, region,
internship_paid, hourly_salary,
year_undertaken, recommend_again,
employer_supervisor, employer_phone,
employer_email, not_recommended_desc,
full_time_offer, full_time_accept,
attend_summer_classes,
summer_classes_institution,
summer_classes_desc, summer_travel,
summer_travel_city, summer_travel_state,
summer_travel_country,
summer_other_activity,
summer_other_activity_desc, how_discovered,
doe_start_month, doe_start_day,
doe_end_month, doe_end_day from
interndata Processing Document # 1
at org.apache.solr.handler.dataimport.DataImportHandlerException.wrapAndThrow(DataImportHandlerException.java:72)
at org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.(JdbcDataSource.java:253)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:210)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:59)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:73)
at org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:238)
at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:596)
at org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:268)
at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:187)
at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:359)
at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:427)
at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:408)
Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection refused
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection refused
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2666)
at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:161)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:128)
at org.apache.solr.handler.dataimport.JdbcDataSource.getConnection(JdbcDataSource.java:363)
at org.apache.solr.handler.dataimport.JdbcDataSource.access$200(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:240)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:210)
at org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:59)
at org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:73)
at org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:238)
at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:596)
at org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:268)
at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:187)
at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:359)
at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:427)
at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:408)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2741)
at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:161)
at org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:128)
at org.apache.solr.handler.dataimport.JdbcDataSource.getConnection(JdbcDataSource.java:363)
at org.apache.solr.handler.dataimport.JdbcDataSource.access$200(JdbcDataSource.java:39)
at org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:240)
... 11 more
Jan 27, 2012 4:02:32 PM org.apache.solr.update.DirectUpdateHandler2 rollback
INFO: start rollback
Jan 27, 2012 4:02:32 PM org.apache.solr.update.DirectUpdateHandler2 rollback
INFO: end_rollback

This is just a connection error, so check the data sources in the beginning of the data-config.xml file in Solr. It's probably just something simple like a bad URL, incorrect credentials, forgot to put the DB name in the URL, etc. Make sure you can ping the DB server from the Solr server.
The datasource tag should be something like this:
<dataSource type="JdbcDataSource"
driver="com.mysql.jdbc.Driver"
url="jdbc:mysql://database.server.com/database-name"
user="user"
password="pass"
name="datasource-name" />
And the entities in your data-config.xml should either have no datasource specified (if you only have one in the file) or should specify the name of the datasource you want to use if there are multiple.
Good luck!