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https://issues.apache.org/jira/browse/AMBARI-19899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebastian Toader updated AMBARI-19899:
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Fix Version/s: 2.5.0
> Balancer triggered from Ambari UI exits after 40mins
> ----------------------------------------------------
>
> Key: AMBARI-19899
> URL: https://issues.apache.org/jira/browse/AMBARI-19899
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.4.0
> Environment: Ambari 2.4.1.0
> Reporter: Sandeep Nemuri
> Assignee: Laszlo Puskas
> Fix For: 2.5.0
>
>
> *PROBLEM* : Balancer triggered from Ambari exits from UI after 40mins with
> the below error.
> {code}
> stderr: /var/lib/ambari-agent/data/errors-27542.txt
> Traceback (most recent call last):
> File
> "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py",
> line 408, in <module>
> NameNode().execute()
> File
> "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
> line 219, in execute
> method(env)
> File
> "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py",
> line 344, in rebalancehdfs
> logoutput = False,
> File "/usr/lib/python2.6/site-packages/resource_management/core/base.py",
> line 154, in __init__
> self.env.run()
> File
> "/usr/lib/python2.6/site-packages/resource_management/core/environment.py",
> line 160, in run
> self.run_action(resource, action)
> File
> "/usr/lib/python2.6/site-packages/resource_management/core/environment.py",
> line 124, in run_action
> provider_action()
> File
> "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py",
> line 238, in action_run
> tries=self.resource.tries, try_sleep=self.resource.try_sleep)
> File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py",
> line 70, in inner
> result = function(command, **kwargs)
> File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py",
> line 92, in checked_call
> tries=tries, try_sleep=try_sleep)
> File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py",
> line 140, in _call_wrapper
> result = _call(command, **kwargs_copy)
> File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py",
> line 291, in _call
> raise Fail(err_msg)
> resource_management.core.exceptions.Fail: Execution of 'ambari-sudo.sh su
> hdfs -l -s /bin/bash -c 'export
> PATH='"'"'/usr/sbin:/sbin:/usr/lib/ambari-server/*:/sbin:/usr/sbin:/bin:/usr/bin:/var/lib/ambari-agent:/usr/hdp/current/hadoop-client/bin'"'"'
> KRB5CCNAME=/tmp/hdfs_rebalance_cc_f89f1ef37ada08b15101ad05225cf12d ; hdfs
> --config /usr/hdp/current/hadoop-client/conf balancer -threshold 10''
> returned 252. 17/01/17 10:42:45 INFO balancer.Balancer: Using a threshold of
> 10.0
> 17/01/17 10:42:45 INFO balancer.Balancer: namenodes = [hdfs://sandytest]
> 17/01/17 10:42:45 INFO balancer.Balancer: parameters =
> Balancer.BalancerParameters [BalancingPolicy.Node, threshold = 10.0, max idle
> iteration = 5, #excluded nodes = 0, #included nodes = 0, #source nodes = 0,
> #blockpools = 0, run during upgrade = false]
> 17/01/17 10:42:45 INFO balancer.Balancer: included nodes = []
> 17/01/17 10:42:45 INFO balancer.Balancer: excluded nodes = []
> 17/01/17 10:42:45 INFO balancer.Balancer: source nodes = []
> Time Stamp Iteration# Bytes Already Moved Bytes Left To Move Bytes Being
> Moved
> 17/01/17 10:42:46 INFO balancer.KeyManager: Block token params received from
> NN: update interval=10hrs, 0sec, token lifetime=10hrs, 0sec
> 17/01/17 10:42:46 INFO block.BlockTokenSecretManager: Setting block keys
> 17/01/17 10:42:46 INFO balancer.KeyManager: Update block keys every 2hrs,
> 30mins, 0sec
> java.io.IOException: Another Balancer is running.. Exiting ...
> Jan 17, 2017 10:42:46 AM Balancing took 2.048 seconds
> stdout: /var/lib/ambari-agent/data/output-27542.txt
> {code}
> One thing to note here is the balancer process will be still running in the
> background.
> As per [~lpuskas]
> * the command timeout comes from the custom action definition defined in the
> service matainfo descriptor
> * server side the timeout is increased with a wired in 10min timeout
> (thus in case of the hdfs rebalance custom action the timeout will be
> 1800s+600s=2400s=40min)
> * this means that if the rebalance operation takes longer than 40 mins, the
> operation will be canceled/timed out)
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