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https://issues.apache.org/jira/browse/ACCUMULO-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081671#comment-15081671
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ASF GitHub Bot commented on ACCUMULO-3509:
------------------------------------------
Github user joshelser commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/62#discussion_r48772476
--- Diff: core/src/main/java/org/apache/accumulo/core/conf/Property.java ---
@@ -226,6 +226,7 @@
TSERV_MEM_MGMT("tserver.memory.manager",
"org.apache.accumulo.server.tabletserver.LargestFirstMemoryManager",
PropertyType.CLASSNAME,
"An implementation of MemoryManger that accumulo will use."),
TSERV_SESSION_MAXIDLE("tserver.session.idle.max", "1m",
PropertyType.TIMEDURATION, "maximum idle time for a session"),
+ TSERV_UPDATE_SESSION_MAXIDLE("tserver.session.update.idle.max", "1m",
PropertyType.TIMEDURATION, "maximum idle time for an update session"),
--- End diff --
Could you make the new property description a complete sentence, please?
> Scanner lock cause Tablet lock, hence preventing idle scans from being swept,
> hence blocking SimpleTimer thread
> ----------------------------------------------------------------------------------------------------------------
>
> Key: ACCUMULO-3509
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3509
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Affects Versions: 1.6.0
> Reporter: marco polo
> Assignee: marco polo
> Fix For: 1.6.5, 1.7.1, 1.8.0
>
>
> Synchronization with Tablet$Scanner via a read() will block close() being
> called via the sweep method in TabletServer. As a result, the SimpleTimer
> thread does not continue, and idle threads grow until the scan completes.
> My patch, which is forthcoming, converts synchronized methods to use a fair
> lock. If the lock is held by a read call, the close call will attempt to
> obtain it, time out, and return indicating a close was not successful. The
> sweep will continue, and the SimpleTimer thread will respawn later,
> attempting closure on those Tablets at a later time.
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