Before I go and file a ticket is this ticket related to this problem? https://issues.apache.org/jira/browse/LOG4J2-2537 I don't have that warning on the application output however.
log4j2 version is 2.13.1 On Fri, Dec 18, 2020 at 1:41 PM Carter Kozak <cko...@ckozak.net> wrote: > If we made a change that results in degraded performance, we should > investigate and fix it. I imagine this would have an impact on application > startup time even if all loggers are loaded once as static fields. > > Can you confirm the log4j2 version that you're using in this example? > It appears that logger instances are not stored, but instead requested > from the context as needed. The process of loading a logger is meant to be > potentially more expensive than subsequent uses (we want to front-load work > so that each event logged later is less expensive), so minimizing calls to > LogManager/LoggerFactory.getLogger is ideal regardless of other factors. > > Would you mind filing a jira ticket for this? > > Thanks, > Carter > > On Fri, Dec 18, 2020, at 16:27, Sean McCauliff wrote: > > 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) > > >
