[DRILL-785] org.apache.drill.exec.rpc.bit.ListenerPool leak suspects

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.1.0-m1
• Fix Version/s: 0.4.0
• Component/s: Execution - RPC
• Assignee: Aditya Kishore
• Reporter: griffin li
• Created: 20/May/14 03:15
• Updated: 31/Jul/14 05:52
• Resolved: 31/Jul/14 05:52

Description

the drillbit down for every 7 or 8 day. i print the gc details and find a lot of full gc before down. I dump the heap and analysis with mat and find the ListenerPool may have problem.
Below is the full message in mat leak suspects:
One instance of "org.apache.drill.exec.rpc.bit.ListenerPool" loaded by "sun.misc.Launcher$AppClassLoader @ 0x638052d50" occupies 3,484,931,208 (98.72%) bytes. The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".

Keywords
java.util.concurrent.ConcurrentHashMap$Segment[]
org.apache.drill.exec.rpc.bit.ListenerPool
sun.misc.Launcher$AppClassLoader @ 0x638052d50

Then i quick look at ListenerPool and does not find any place to remove object from the listeners. Does this is a problem？