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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14772) Improve zombie detector; be more discerning
Date Fri, 04 Dec 2015 01:48:10 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

stack updated HBASE-14772:
       Resolution: Fixed
    Fix Version/s: 2.0.0
           Status: Resolved  (was: Patch Available)

Resolving for now. I've done enough messing in here. Now the zombie detector shows up like
any other attribute in the report and the zombie detector is shared by test-patch and jenkins
branch builds.

> Improve zombie detector; be more discerning
> -------------------------------------------
>                 Key: HBASE-14772
>                 URL: https://issues.apache.org/jira/browse/HBASE-14772
>             Project: HBase
>          Issue Type: Sub-task
>          Components: test
>            Reporter: stack
>            Assignee: stack
>             Fix For: 2.0.0
>         Attachments: 14772v3.patch, zombie.patch, zombiev2.patch
> Currently, any surefire process with the hbase flag is a potential zombie. Our zombie
check currently takes a reading and if it finds candidate zombies, it waits 30 seconds and
then does another reading. If a concurrent build going on, in both cases the zombie detector
will come up positive though the adjacent test run may be making progress; i.e. the cast of
surefire processes may have changed between readings but our detector just sees presence of
 hbase surefire processes.
> Here is example:
> {code}
> Suspicious java process found - waiting 30s to see if there are just slow to stop
> There appear to be 5 zombie tests, they should have been killed by surefire but survived
> 12823 surefirebooter852180186418035480.jar -enableassertions -Dhbase.test -Xmx2800m -XX:MaxPermSize=256m
-Djava.security.egd=file:/dev/./urandom -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true
> 7653 surefirebooter8579074445899448699.jar -enableassertions -Dhbase.test -Xmx2800m -XX:MaxPermSize=256m
-Djava.security.egd=file:/dev/./urandom -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true
> 12614 surefirebooter136529596936417090.jar -enableassertions -Dhbase.test -Xmx2800m -XX:MaxPermSize=256m
-Djava.security.egd=file:/dev/./urandom -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true
> 7836 surefirebooter3217047564606450448.jar -enableassertions -Dhbase.test -Xmx2800m -XX:MaxPermSize=256m
-Djava.security.egd=file:/dev/./urandom -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true
> 13566 surefirebooter2084039411151963494.jar -enableassertions -Dhbase.test -Xmx2800m
-XX:MaxPermSize=256m -Djava.security.egd=file:/dev/./urandom -Djava.net.preferIPv4Stack=true
> ************ BEGIN zombies jstack extract
> ************ END  zombies jstack extract
> {code}
> 5 is the number of forked processes we allow when doing medium and large tests.... so
an adjacent build will always show as '5 zombies'.
> Need to add discerning if list of processes changes between readings.
> Can I also add a tag per build run that all forked processes pick up so I can look at
the current builds progeny only?

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