Java Agent is running on Linux server but not connecting to APM SaaS

Products

• CA Application Performance Management Agent (APM / Wily / Introscope)

Issue/Introduction

APM SAAS UI is showing blank graph for the Java agent. We check the application server and it is running. The agent log file is showing following ERROR messages:

[ERROR] [IntroscopeAgent.Agent] The thread named "Agent ServerConnection" has unexpectedly terminated because of java.lang.OutOfMemoryError Java heap space

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.ws.session.                              WsSessionInvalidatorWithThreadPool$InvalidationTask.run()V.

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.ws.session.                              WsSessionInvalidatorWithThreadPool$InvalidationTask.run()V.

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.ws.session.                              WsSessionInvalidatorWithThreadPool$InvalidationTask.run()V.

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.ws.session.                              WsSessionInvalidatorWithThreadPool$InvalidationTask.run()V.

[WARN] [IntroscopeAgent.Agent] Heartbeat: Agent, Behavior: Data Poller has been running for excessively long time (291253 ms).

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.io.async.ResultHandler$2.run()V.

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.ws.session.                              WsSessionInvalidatorWithThreadPool$InvalidationTask.run()V.

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.io.async.Re sultHandler$2.run()V.

[ERROR] [IntroscopeAgent.Agent] A problem occurred while loading the tracers for com.ibm.io.async.ResultHandler$2.run()V.

[INFO] [IntroscopeAgent.Agent] The Agent Transaction Trace limit (introscope.agent.ttClamp) of 50 transactions every interval has been reached. No more transactions traces will be reported for this interval.

[WARN] [IntroscopeAgent.Agent] Enterprise Manager responding too slowly, disconnecting

[INFO] [IntroscopeAgent.Agent] AutoTracingTriggerServiceBean passivated.

Environment

Release : 21.3

Component : BOOTSTRAP AGENT

Resolution

Restart of the WebSphere App Server resolved the issue.