[
https://issues.apache.org/jira/browse/ACCUMULO-1416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657090#comment-13657090
]
Keith Turner commented on ACCUMULO-1416:
----------------------------------------
This check was not related to walogs. When the OS disk goes read only, it will
leave this system in a really screwy state. In this state existing connections
are kept alive and new connections can not be formed. So its possible to end
with a live tserver that clients can not connect to.
Changes were made for ACCUMULO-513 to make the master always get a new
connection when getting tserver status (used to reuse connections). This
should help the master find and kill these zombie tservers.
It seems like w/ the changes in ACCUMULO-513 that this check could be removed.
If not removed it should be made to focus on the OS disk, and not the data disk.
> FileSystemMonitor isn't necessary anymore?
> ------------------------------------------
>
> Key: ACCUMULO-1416
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1416
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Reporter: John Vines
>
> With the removal of direct walogs, do we still need tservers monitoring the
> filesystem and dying if things go wonky? Just had it happen and the death of
> the tserver didn't seem necessary, especially with multiple disks.
> Relevant stack trace-
> {code}
> 2013-05-14 08:54:55,693 [util.FileSystemMonitor] FATAL: Exception while
> checking mount points, halting process
> java.lang.Exception: Filesystem /data/04 switched to read only
> at
> org.apache.accumulo.server.util.FileSystemMonitor.checkMounts(FileSystemMonitor.java:134)
> at
> org.apache.accumulo.server.util.FileSystemMonitor$1.run(FileSystemMonitor.java:91)
> at java.util.TimerThread.mainLoop(Timer.java:534)
> at java.util.TimerThread.run(Timer.java:484)
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
