xiezhaoodong created LOGBACK-1358: ------------------------------------- Summary: why AsyncAppender worker thread don't catch the error and Exception Key: LOGBACK-1358 URL: https://jira.qos.ch/browse/LOGBACK-1358 Project: logback Issue Type: Bug Components: logback-core Affects Versions: 1.2.3 Environment: linux X86_64 LOGBACK VERSION : !image-2017-12-04-20-11-40-721.png! Reporter: xiezhaoodong Assignee: Logback dev list Attachments: image-2017-12-04-20-09-02-754.png, image-2017-12-04-20-11-40-721.png {code:java} class Worker extends Thread { public void run() { AsyncAppenderBase<E> parent = AsyncAppenderBase.this; AppenderAttachableImpl<E> aai = parent.aai; while (parent.isStarted()) { try { E e = parent.blockingQueue.take(); aai.appendLoopOnAppenders(e); } catch (InterruptedException ie) { break; } } addInfo("Worker thread will flush remaining events before exiting. "); for (E e : parent.blockingQueue) { aai.appendLoopOnAppenders(e); parent.blockingQueue.remove(e); } aai.detachAndStopAllAppenders(); } } {code} There is a worker object in the object AsyncAppenderBase。 if run() method don't catch the exception and error，when OutOfMemory occurs。this thread will dead like this： !image-2017-12-04-20-09-02-754.png! OOM make the appender-worker dead when the blockingQueue（use ArrayBlockingQueue） is full，the "put" thead will hang forever！！！！ First of all, thank you for answering my doubts -- This message was sent by Atlassian JIRA (v7.3.1#73012)