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记录器在 logger.info 期间冻结

[英]Logger is freezing during logger.info

 原文  2019-10-01 21:05:13  2   1    java/ spring-boot/ logback/ spring-logback/ logback-classic

问题描述

My background job is (regularly) getting stuck when calling log.info(...) with Logback:当使用 Logback 调用 log.info(...) 时，我的后台工作（经常）卡住了：

"pool-5-thread-1" #30 prio=5 os_prio=0 tid=0x00007f11c4ff2000 nid=0x100 waiting on condition [0x00007f11bd21a000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000000db93e3a8> (a java.util.concurrent.locks.ReentrantLock$FairSync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
    at java.util.concurrent.locks.ReentrantLock$FairSync.lock(ReentrantLock.java:224)
    at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:217)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:103)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:396)
    at ch.qos.logback.classic.Logger.info(Logger.java:600)
    at com.website.configuration.BackgroundJobs.lambda$run$2(BackgroundJobs.java:410)
    at com.website.configuration.BackgroundJobs$$Lambda$85/1402118067.accept(Unknown Source)
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
    at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
    at com.website.configuration.BackgroundJobs.run(BackgroundJobs.java:396)
    at sun.reflect.GeneratedMethodAccessor59.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

It sits in this state and doesn't progress until I restart the server.它位于此 state 中，直到我重新启动服务器才进展。

Any ideas why this might happen?任何想法为什么会发生这种情况？

I'm using spring boot 1.3.1.RELEASE with org.springframework.boot:spring-boot-starter-web:1.3.1.RELEASE which uses logback-classic-1.1.3.我正在使用 spring boot 1.3.1.RELEASE 和 org.springframework.boot:spring-boot-starter-web:1.3.1.RELEASE，它使用 logback-classic-1.1.3。

And I'm defining my loggers in my @Controllers and @Configuration classes like so:我在 @Controllers 和 @Configuration 类中定义我的记录器，如下所示：

final Logger log = LoggerFactory.getLogger(getClass().getName());

And here is another thread-dump showing the same issue, but this time log.info is being called from a different class:这是另一个显示相同问题的线程转储，但这次 log.info 是从不同的 class 调用的：

"pool-5-thread-1" #30 prio=5 os_prio=0 tid=0x00007f96f5cdc800 nid=0x100 waiting on condition [0x00007f9737d66000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000000db6501f0> (a java.util.concurrent.locks.ReentrantLock$FairSync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
    at java.util.concurrent.locks.ReentrantLock$FairSync.lock(ReentrantLock.java:224)
    at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:217)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:103)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:396)
    at ch.qos.logback.classic.Logger.info(Logger.java:600)
    at com.website.service.JobScheduler.scheduleJob(JobScheduler.java:55)
    at com.website.configuration.BackgroundJobs.lambda$run$2(BackgroundJobs.java:411)
    at com.website.configuration.BackgroundJobs$$Lambda$85/1061458720.accept(Unknown Source)
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
    at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
    at com.website.configuration.BackgroundJobs.run(BackgroundJobs.java:396)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

1 个解决方案

解决方案1
 0  2019-10-02 13:51:15

It looks like the actual problem was that I was logging so much in parallel that the logger was waiting for all the other logs to be output so it could continue.看起来实际的问题是我并行记录了太多，以至于记录器正在等待所有其他日志成为 output 以便它可以继续。

Have improved the situation by reducing the amount of logging I'm doing.通过减少我正在做的日志记录量来改善这种情况。

And will later investigate asynchronous logging libraries (ie loggers that don't block).稍后将研究异步日志库（即不阻塞的记录器）。

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