EAP 7 creates too many jaeger threads during start up

Solution Verified - Updated

Environment

  • JBoss Enterprise Application Platform (EAP) 7.3.x

Issue

"jaeger.RemoteReporter-FlushTimer" #5976 daemon prio=5 os_prio=0 tid=0x000055cc87bad800 nid=0xa7e1 in Object.wait() [0x00007f85fc4fb000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.util.TimerThread.mainLoop(Timer.java:552)
	- locked <0x00000003552ba340> (a java.util.TaskQueue)
	at java.util.TimerThread.run(Timer.java:505)

"jaeger.RemoteReporter-QueueProcessor" #5975 daemon prio=5 os_prio=0 tid=0x000055cc87bab800 nid=0xa7e0 waiting on condition [0x00007f85fc57c000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000003552ba110> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at io.jaegertracing.internal.reporters.RemoteReporter$QueueProcessor.run(RemoteReporter.java:173)
	at java.lang.Thread.run(Thread.java:748)

Resolution

  • Remove these tech preview features from the JBoss standalone or domain configuration:
        <extension module="org.wildfly.extension.microprofile.config-smallrye"/>
        <extension module="org.wildfly.extension.microprofile.health-smallrye"/>
        <extension module="org.wildfly.extension.microprofile.metrics-smallrye"/>
        <extension module="org.wildfly.extension.microprofile.opentracing-smallrye"/>
...
        <subsystem xmlns="urn:wildfly:microprofile-config-smallrye:1.0"/>
        <subsystem xmlns="urn:wildfly:microprofile-health-smallrye:2.0" security-enabled="false" empty-liveness-checks-status="${env.MP_HEALTH_EMPTY_LIVENESS_CHECKS_STATUS:UP}" empty-readiness-checks-status="${env.MP_HEALTH_EMPTY_READINESS_CHECKS_STATUS:UP}"/>
        <subsystem xmlns="urn:wildfly:microprofile-metrics-smallrye:2.0" security-enabled="false" exposed-subsystems="*" prefix="${wildfly.metrics.prefix:jboss}"/>
        <subsystem xmlns="urn:wildfly:microprofile-opentracing-smallrye:1.0"/>
  • Update to EAP 7.4.0+ where these tech previews are removed
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