Enis Soztutar created HBASE-10810:
-------------------------------------
Summary: LoadTestTool should share the connection and connection
pool
Key: HBASE-10810
URL: https://issues.apache.org/jira/browse/HBASE-10810
Project: HBase
Issue Type: Sub-task
Reporter: Enis Soztutar
Assignee: Enis Soztutar
Fix For: hbase-10070
While running the IT test from HBASE-10572, we've noticed that the number of
threads jumps to 4K's when CM actions are going on.
Our [~ndimiduk] summarizes the problem quite good:
MultiThreadedReader creates this pool for each HTable:
{code}
ThreadPoolExecutor pool = new ThreadPoolExecutor(1, maxThreads,
keepAliveTime, TimeUnit.SECONDS,
new SynchronousQueue<Runnable>(),
Threads.newDaemonThreadFactory("htable"));
{code}
This comes from the HTable creation
{code}
public HTable(Configuration conf, final TableName tableName)
{code}
As well the javadoc says Recommended.
This is wrong.
In this issue we can change the LTT sub classes to use the shared connection
object and initialize their tables using HConnection.getTable() rather than new
HTable().
This is relevant to trunk as well, but there since there is only one
outstanding RPC per thread, it is not such a big problem.
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