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https://issues.apache.org/jira/browse/HBASE-4863?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Bautin updated HBASE-4863:
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Attachment: 0001-Fix-thread-leaks-in-the-HBase-thread-pool-server.patch
The same as D531.3.patch but generated using "git format-patch --no-prefix
HEAD^..HEAD" so that it can be applied using the normal patch command.
> Make HBase Thrift server more configurable and add a command-line UI test
> -------------------------------------------------------------------------
>
> Key: HBASE-4863
> URL: https://issues.apache.org/jira/browse/HBASE-4863
> Project: HBase
> Issue Type: Improvement
> Reporter: Mikhail Bautin
> Assignee: Mikhail Bautin
> Attachments:
> 0001-Fix-thread-leaks-in-the-HBase-thread-pool-server.patch, D531.1.patch,
> D531.2.patch, D531.3.patch
>
>
> This started as an internal hotfix where we found out that the Thrift server
> spawned 15000 threads. To bound the thread pool size I added a custom thread
> pool server implementation called HBaseThreadPoolServer into HBase codebase,
> and made the following parameters configurable from both command line and as
> config settings: minWorkerThreads, maxWorkerThreads, and maxQueuedRequests.
> Under an increasing load, the server creates new threads for every connection
> before the pool size reaches minWorkerThreads. After that, the server puts
> new connections into the queue and only creates a new thread when the queue
> is full. If an attempt to create a new thread fails, the server drops
> connection. The default TThreadPoolServer would crash in that case, but it
> never happened because the thread pool was unbounded, so the server would
> hang indefinitely, consume a lot of memory, and cause huge latency spikes on
> the client side.
> Another part of this fix is refactoring and unit testing of the command-line
> part of the Thrift server. The logic there is sufficiently complicated, and
> the existing ThriftServer class does not test that part at all. The new
> TestThriftServerCmdLine test starts the Thrift server on a random port with
> various combinations of options and talks to it through the client API from
> another thread.
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