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Tsuyoshi Ozawa commented on MAPREDUCE-6265: ------------------------------------------- Sure, I'll check it. > make INITIAL_POOL_SIZE in ContainerLauncherImpl configurable to better > control the thread pool size to launch/kill containers. > ------------------------------------------------------------------------------------------------------------------------------ > > Key: MAPREDUCE-6265 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-6265 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: mrv2 > Reporter: zhihai xu > Assignee: zhihai xu > Attachments: MAPREDUCE-6265.000.patch > > > make INITIAL_POOL_SIZE in ContainerLauncherImpl configurable to better > control the thread pool size to launch/kill containers > Currently INITIAL_POOL_SIZE in ContainerLauncherImpl is hard-coded at > {code} > protected static final int INITIAL_POOL_SIZE = 10; > {code} > We should make it configurable because the thread pool size will be decided > by INITIAL_POOL_SIZE, limitOnPoolSize and number of node used by the AM. > Since we already made limitOnPoolSize configurable, it make senses to also > make INITIAL_POOL_SIZE configurable to better manage the thread pool size. > We saw some issue due to the small thread pool size when some node is down. > The recovery from a shutdown node take very long time due to all the > ContainerLauncher threads are blocked by IPC client connection to the > shutdown node. -- This message was sent by Atlassian JIRA (v6.3.4#6332)