Karthik Kambatla created HADOOP-9682:
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Summary: Deadlock between RenewalTimerTask methods cancel() and
run()
Key: HADOOP-9682
URL: https://issues.apache.org/jira/browse/HADOOP-9682
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 1.2.0
Reporter: Karthik Kambatla
Assignee: Karthik Kambatla
MAPREDUCE-4860 introduced a local variable {{cancelled}} in
{{RenewalTimerTask}} to fix the race where {{DelegationTokenRenewal}} attempts
to renew a token even after the job is removed. However, the patch also makes
{{run()}} and {{cancel()}} synchronized methods leading to a potential deadlock
against {{run()}}'s catch-block (error-path).
The deadlock stacks below:
{noformat}
-
org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal$RenewalTimerTask.cancel()
@bci=0, line=240 (Interpreted frame)
-
org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal.removeDelegationTokenRenewalForJob(org.apache.hadoop.mapreduce.JobID)
@bci=109, line=319 (Interpreted frame)
{noformat}
{noformat}
-
org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal.removeFailedDelegationToken(org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal$DelegationTokenToRenew)
@bci=62, line=297 (Interpreted frame)
-
org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal.access$300(org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal$DelegationTokenToRenew)
@bci=1, line=47 (Interpreted frame)
-
org.apache.hadoop.mapreduce.security.token.DelegationTokenRenewal$RenewalTimerTask.run()
@bci=148, line=234 (Interpreted frame)
{noformat}
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