Chandni Singh created YARN-9839: ----------------------------------- Summary: NodeManager java.lang.OutOfMemoryError unable to create new native thread Key: YARN-9839 URL: https://issues.apache.org/jira/browse/YARN-9839 Project: Hadoop YARN Issue Type: Bug Reporter: Chandni Singh Assignee: Chandni Singh
NM fails with the below error even though the ulimit for NM is large. {code} 2019-09-12 10:27:46,348 ERROR org.apache.hadoop.util.Shell: Caught java.lang.OutOfMemoryError: unable to create new native thread. One possible reason is that ulimit setting of 'max user processes' is too low. If so, do 'ulimit -u <largerNum>' and try again. 2019-09-12 10:27:46,348 FATAL org.apache.hadoop.yarn.YarnUncaughtExceptionHandler: Thread Thread[LocalizerRunner for container_e95_1568242982456_152026_01_000132,5,main] threw an Error. Shutting down now... java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:717) at org.apache.hadoop.util.Shell.runCommand(Shell.java:562) at org.apache.hadoop.util.Shell.run(Shell.java:482) at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:776) at org.apache.hadoop.util.Shell.execCommand(Shell.java:869) at org.apache.hadoop.util.Shell.execCommand(Shell.java:852) at org.apache.hadoop.fs.FileUtil.execCommand(FileUtil.java:1097) at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.loadPermissionInfo(RawLocalFileSystem.java:659) at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.getPermission(RawLocalFileSystem.java:634) at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.checkLocalDir(ResourceLocalizationService.java:1441) at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.getInitializedLocalDirs(ResourceLocalizationService.java:1405) at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.access$800(ResourceLocalizationService.java:140) at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService$LocalizerRunner.run(ResourceLocalizationService.java:1114) {code} For each container localization request, there is a {{LocalizerRunner}} thread created and each {{LocalizerRunner}} creates another thread to get file permission info which is where we see this failure from. It is in Shell.java -> {{runCommand()}} {code} Thread errThread = new Thread() { @Override public void run() { try { String line = errReader.readLine(); while((line != null) && !isInterrupted()) { errMsg.append(line); errMsg.append(System.getProperty("line.separator")); line = errReader.readLine(); } } catch(IOException ioe) { LOG.warn("Error reading the error stream", ioe); } } }; {code} {{LocalizerRunner}} are Threads which are cached in {{ResourceLocalizationService}}. Looking into a possibility if they are not getting removed from the cache. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-dev-h...@hadoop.apache.org