Jon Bender created YARN-8786:
--------------------------------
Summary: LinuxContainerExecutor fails sporadically in
create_local_dirs
Key: YARN-8786
URL: https://issues.apache.org/jira/browse/YARN-8786
Project: Hadoop YARN
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: Jon Bender
We started using CGroups with LinuxContainerExecutor recently, running Apache
Hadoop 3.0.0. Occasionally (once out of many millions of tasks) a yarn
container will fail with a message like the following:
{code:java}
[2018-09-02 23:48:02.458691] 18/09/02 23:48:02 INFO container.ContainerImpl:
Container container_1530684675517_516620_01_020846 transitioned from SCHEDULED
to RUNNING
[2018-09-02 23:48:02.458874] 18/09/02 23:48:02 INFO
monitor.ContainersMonitorImpl: Starting resource-monitoring for
container_1530684675517_516620_01_020846
[2018-09-02 23:48:02.506114] 18/09/02 23:48:02 WARN
privileged.PrivilegedOperationExecutor: Shell execution returned exit code: 35.
Privileged Execution Operation Stderr:
[2018-09-02 23:48:02.506159] Could not create container dirsCould not create
local files and directories
[2018-09-02 23:48:02.506220]
[2018-09-02 23:48:02.506238] Stdout: main : command provided 1
[2018-09-02 23:48:02.506258] main : run as user is nobody
[2018-09-02 23:48:02.506282] main : requested yarn user is root
[2018-09-02 23:48:02.506294] Getting exit code file...
[2018-09-02 23:48:02.506307] Creating script paths...
[2018-09-02 23:48:02.506330] Writing pid file...
[2018-09-02 23:48:02.506366] Writing to tmp file
/path/to/hadoop/yarn/local/nmPrivate/application_1530684675517_516620/container_1530684675517_516620_01_020846/container_1530684675517_516620_01_020846.pid.tmp
[2018-09-02 23:48:02.506389] Writing to cgroup task files...
[2018-09-02 23:48:02.506402] Creating local dirs...
[2018-09-02 23:48:02.506414] Getting exit code file...
[2018-09-02 23:48:02.506435] Creating script paths...
{code}
Looking at the container executor source it's traceable to errors here:
[https://github.com/apache/hadoop/blob/release-3.0.0-RC1/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c#L1604]
And ultimately to
[https://github.com/apache/hadoop/blob/release-3.0.0-RC1/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c#L672]
The root failure seems to be in the underlying mkdir call, but that exit code /
errno is swallowed so we don't have more details. We tend to see this when many
containers start at the same time for the same application on a host, and
suspect it may be related to some race conditions around those shared
directories between containers for the same application.
For example, this is a typical pattern in the audit logs:
{code:java}
[2018-09-07 17:16:38.447654] 18/09/07 17:16:38 INFO nodemanager.NMAuditLogger:
USER=root IP=<> Container Request TARGET=ContainerManageImpl
RESULT=SUCCESS APPID=application_1530684675517_559126
CONTAINERID=container_1530684675517_559126_01_012871
[2018-09-07 17:16:38.492298] 18/09/07 17:16:38 INFO nodemanager.NMAuditLogger:
USER=root IP=<> Container Request TARGET=ContainerManageImpl
RESULT=SUCCESS APPID=application_1530684675517_559126
CONTAINERID=container_1530684675517_559126_01_012870
[2018-09-07 17:16:38.614044] 18/09/07 17:16:38 WARN nodemanager.NMAuditLogger:
USER=root OPERATION=Container Finished - Failed TARGET=ContainerImpl
RESULT=FAILURE DESCRIPTION=Container failed with state: EXITED_WITH_FAILURE
APPID=application_1530684675517_559126
CONTAINERID=container_1530684675517_559126_01_012871
{code}
Two containers for the same application starting in quick succession followed
by the EXITED_WITH_FAILURE step (exit code 35).
We plan to upgrade to 3.1.x soon but I don't expect this to be fixed by this,
the only major JIRAs that affected the executor since 3.0.0 seem unrelated
([https://github.com/apache/hadoop/commit/bc285da107bb84a3c60c5224369d7398a41db2d8]
and
[https://github.com/apache/hadoop/commit/a82be7754d74f4d16b206427b91e700bb5f44d56])
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