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.
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