"java.lang.OutOfMemoryError" is seen in ThingWorx Platform log file

• Error retrieving a lot of data from external database
• Java Heap Space error retrieving large amounts of data from external database
• ThingWorx is starting but after some time it is freezing
• ThingWorx server which was previously communicating suddenly becomes unable to communicate
• After starting the ThingWorx instance, communication is possible via https but after a while the login popup doesn't appear
• Memory Utilization in critical state for ThingWorx Platform
• ThingWorx fails to start with an out of memory error
• ThingWorx shutdown unexpected within High Availability configuration
• Getting page unresponsiveness on browser while ThingWorx takes time to load the complete mashup
• Apache Tomcat fails to start with error message:

java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space

• ThingWorx Platform fails to start with one or more of the following errors:
  • <ThingworxStorage>\logs\ErrorLog.log

java.lang.OutOfMemoryError: Java heap space

• <ThingworxStorage>\logs\ApplicationLog.log

Commons Daemon procrun stdout initialized
Error occurred during initialization of VM
Could not reserve enough space for <xxxxx>KB object heap
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Metaspace

• <tomcat_home>\logs\thingworx-foundation-stderr.<date>.log

Exception in thread "WSExecutionProcessor-190" java.lang.OutOfMemoryError: Java heap space
Exception in thread "xxx" 
Exception in thread "http-nio-8080-Acceptor" 
Exception in thread "WebSocket background processing" 
Exception in thread "Multipart message gc timer" 
Exception in thread "pool-20-thread-7" 
Exception in thread "Timer-x" 
Exception in thread "mssql-jdbc-shared-timer-core-565" 
Exception in thread "Timer-3" 
Exception in thread "C3P0PooledConnectionPoolManager[identityToken->2u2o5xav11gbysxf40298|7cac04c3]-HelperThread-#5" 
Exception in thread "TWEventProcessor-8" 
org.apache.coyote.AbstractProtocol$ConnectionHandler process
Critical: Failed to fully process the request
java.lang.OutOfMemoryError: Java heap space

• <tomcat_home>\logs\catalina.out

SEVERE [http-nio-8443-ClientPoller-1] org.apache.tomcat.util.net.NioEndpoint$Poller.run
 java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:714)
    at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:950)

• <tomcat_home>\logs\catalina.<date>.log

SEVERE [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.startup.HostConfig.deployWARs Error waiting for multi-thread deployment of WAR files to complete
 java.lang.InterruptedException
    at java.util.concurrent.FutureTask.awaitDone(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)
    at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:733)...

• Data import failing with the following error being logged
  • <ThingworxStorage>\logs\ApplicationLog.log

Error importing: error, Java heap space

• ThingWorx services fail to execute or ThingWorx becomes slow or inaccessible with the following errors being logged:
  • <ThingworxStorage>\logs\ScriptErrorLog.log

[L: ERROR] [O: S.c.q.l.c.Logger] [I: ThingName] [U: <username>] [S: ] [P: ] [T: http-nio-8080-exec-23] Error in: ThingName.ServiceName javascript service. Message ::Java heap space
[L: ERROR] [O: S.c.q.l.c.Logger] [I: ThingName] [U: <username>] [S: ] [P: ] [T: http-nio-8080-exec-27] Error in: ThingName.ServiceName javascript service. Message ::Java heap space: failed reallocation of scalar replaced objects

• <ThingworxStorage>\logs\ScriptLog.log

[L: ERROR] [O: S.c.t.d.e.DSLProcessor] [I: ] [U: <username>] [S: ] [T: http-nio-8443-exec-<Thread Number>] Execution error in service script [<Entity> <Service>] : Wrapped java.lang.Exception: Java heap space Cause: Java heap space

• All subsequent service calls show

[L: ERROR] [O: S.c.t.d.e.DSLProcessor] [I: ] [U: <username>] [S: ] [T: http-nio-8443-exec-<Thread Number>] Execution error in service script [<Entity> <Service>] : Wrapped com.thingworx.common.exceptions.InvalidRequestException: Execution error in service script [<Entity> <Service>] : Wrapped java.lang.Exception: Java heap space Cause: Java heap space Cause: Execution error in service script [<Entity> <Service>] : Wrapped java.lang.Exception: Java heap space Cause: Java heap space