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https://issues.apache.org/jira/browse/HDFS-8663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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tangjunjie reassigned HDFS-8663:
--------------------------------
Assignee: Eugene Koifman
> sys cpu usage high on namenode server
> -------------------------------------
>
> Key: HDFS-8663
> URL: https://issues.apache.org/jira/browse/HDFS-8663
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: fs, namenode
> Affects Versions: 2.3.0
> Environment: hadoop 2.3.0 centos5.8
> Reporter: tangjunjie
> Assignee: Eugene Koifman
>
> sys cpu usage high on namenode server lead to run job very slow.
> I use ps -elf see many zombie process.
> I check hdfs log I found many exceptions like:
> org.apache.hadoop.util.Shell$ExitCodeException: id: sem_410: No such user
> at org.apache.hadoop.util.Shell.runCommand(Shell.java:505)
> at org.apache.hadoop.util.Shell.run(Shell.java:418)
> at
> org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:650)
> at org.apache.hadoop.util.Shell.execCommand(Shell.java:739)
> at org.apache.hadoop.util.Shell.execCommand(Shell.java:722)
> at
> org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getUnixGroups(ShellBasedUnixGroupsMapping.java:83)
> at
> org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getGroups(ShellBasedUnixGroupsMapping.java:52)
> at org.apache.hadoop.security.Groups.getGroups(Groups.java:139)
> at
> org.apache.hadoop.security.UserGroupInformation.getGroupNames(UserGroupInformation.java:1409)
> at
> org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.<init>(FSPermissionChecker.java:81)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getPermissionChecker(FSNamesystem.java:3310)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(FSNamesystem.java:3491)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getFileInfo(NameNodeRpcServer.java:764)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:764)
> at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1026)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1986)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1982)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1980)
> Then I create all user such as sem_410 appear in exception.Then the sys cpu
> usage on namenode down.
> BTW, my hadoop 2.3.0 enaable hadoop acl.
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