There are many threads in our Kafka server performing logging. Their
stacks look like the stack trace below. I see from other email threads
that java.lang.StackWalker in JDK 11 is not as performant as the old sun.*
classes that are used for the same functionality.
Since this is logged at debug level and I'm not seeing this in my logs why
does StackWalker need to be called?
"data-plane-kafka-request-handler-5" #187 daemon prio=5 os_prio=0
cpu=128019254.19ms elapsed=340579.66s tid=0x00007fe3092e1800 nid=0x2be4
runnable [0x00007fd58c9f5000]
java.lang.Thread.State: RUNNABLE
at
java.lang.StackStreamFactory$AbstractStackWalker.callStackWalk(java.base@11.0.8/Native
Method)
at
java.lang.StackStreamFactory$AbstractStackWalker.beginStackWalk(java.base@11.0.8
/StackStreamFactory.java:370)
at
java.lang.StackStreamFactory$AbstractStackWalker.walk(java.base@11.0.8
/StackStreamFactory.java:243)
at java.lang.StackWalker.walk(java.base@11.0.8/StackWalker.java:498)
at
org.apache.logging.log4j.util.StackLocator.getCallerClass(StackLocator.java:57)
at
org.apache.logging.log4j.util.StackLocatorUtil.getCallerClass(StackLocatorUtil.java:67)
at
org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:45)
at
org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:48)
at
org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:30)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:363)
at kafka.utils.Logging.logger(Logging.scala:43)
at kafka.utils.Logging.logger$(Logging.scala:43)
at
kafka.server.IncrementalFetchContext.logger$lzycompute(FetchSession.scala:400)
- locked <0x00000005f016f650> (a
kafka.server.IncrementalFetchContext)
at
kafka.server.IncrementalFetchContext.logger(FetchSession.scala:400)
at kafka.utils.Logging.debug(Logging.scala:62)
at kafka.utils.Logging.debug$(Logging.scala:62)
at
kafka.server.IncrementalFetchContext.debug(FetchSession.scala:400)
at
kafka.server.IncrementalFetchContext.updateAndGenerateResponseData(FetchSession.scala:482)
- locked <0x00000002632d0d70> (a kafka.server.FetchSession)
at
kafka.server.KafkaApis.processResponseCallback$1(KafkaApis.scala:769)
at
kafka.server.KafkaApis.$anonfun$handleFetchRequest$29(KafkaApis.scala:833)
at
kafka.server.KafkaApis.$anonfun$handleFetchRequest$29$adapted(KafkaApis.scala:833)
at
kafka.server.KafkaApis$$Lambda$2090/0x0000000800ffb040.apply(Unknown Source)
at
kafka.server.ReplicaManager.fetchMessages(ReplicaManager.scala:963)
at kafka.server.KafkaApis.handleFetchRequest(KafkaApis.scala:835)
at kafka.server.KafkaApis.handle(KafkaApis.scala:130)
at
kafka.server.KafkaRequestHandler.run(KafkaRequestHandler.scala:70)
at java.lang.Thread.run(java.base@11.0.8/Thread.java:834)
