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From "Douglas Campbell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4159) HBaseServer - IPC Reader threads are not daemons
Date Wed, 03 Aug 2011 18:47:27 GMT
HBaseServer - IPC Reader threads are not daemons
------------------------------------------------

                 Key: HBASE-4159
                 URL: https://issues.apache.org/jira/browse/HBASE-4159
             Project: HBase
          Issue Type: Improvement
          Components: ipc
    Affects Versions: 0.90.3
            Reporter: Douglas Campbell


Doing a jstack on a region server process shows that the IPC Reader threads are not created
as daemon threads whereas IPC Server threads (and other types are). 

This could cause the region server to not exit after the main method does if for some reason
these non-daemon threads don't exit themselves.

Servers are daemon
"IPC Server handler 7 on 60020" daemon prio=10 tid=0x00002aaabc998800 nid=0x7157 waiting on
condition [0x0000000044b4e000]
"IPC Server handler 6 on 60020" daemon prio=10 tid=0x00002aaabc996800 nid=0x7156 waiting on
condition [0x0000000044a4d000]
"IPC Server handler 5 on 60020" daemon prio=10 tid=0x00002aaabc995000 nid=0x7155 waiting on
condition [0x000000004494c000]

Readers are not
"IPC Reader 5 on port 60020" prio=10 tid=0x00002aaabc47d000 nid=0x712a runnable [0x0000000043033000]
"IPC Reader 4 on port 60020" prio=10 tid=0x00002aaabc462000 nid=0x7129 runnable [0x0000000042f32000]
"IPC Reader 3 on port 60020" prio=10 tid=0x00002aaabc447000 nid=0x7128 runnable [0x0000000042e31000]


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