Hi all.
Our environment:
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OS: CentOS 5
2.6.18-238.el5 #1 SMP x86_64 x86_64 x86_64
JVM: Oracle JRockit(R) (build
R28.1.3-11-141760-1.6.0_24-20110301-1432-linux-x86_64
memcached - 1.4.10
spymemcached -2.6
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Recently we start to get next hangs in spymemcached:
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"479483953@qtp-278043096-13494" id=99467 idx=0x750 tid=25001 prio=5 alive,
parked, native_blocked
at jrockit/vm/Locks.park0(J)V(Native Method)
at jrockit/vm/Locks.park(Locks.java:2230)
at jrockit/proxy/sun/misc/Unsafe.park(Unsafe.java:616)[inlined]
at java/util/concurrent/locks/LockSupport.parkNanos(LockSupport.java:198)[inlined]
at java/util/concurrent/locks/AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)[optimized]
at java/util/concurrent/ArrayBlockingQueue.offer(ArrayBlockingQueue.java:287)[optimized]
at net/spy/memcached/protocol/TCPMemcachedNodeImpl.addOp(TCPMemcachedNodeImpl.java:271)[optimized]
at net/spy/memcached/MemcachedConnection.addOperation(MemcachedConnection.java:602)[optimized]
at net/spy/memcached/MemcachedConnection.addOperation(MemcachedConnection.java:582)[inlined]
at net/spy/memcached/MemcachedClient.addOp(MemcachedClient.java:277)[inlined]
at net/spy/memcached/MemcachedClient.asyncGet(MemcachedClient.java:797)[inlined]
at net/spy/memcached/MemcachedClient.asyncGet(MemcachedClient.java:811)[optimized]
at ru/cti/memcached/MemcachedManager.getObjectFromMemcached(MemcachedManager.java:405)[optimized]
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memcached-top show:
memcache-top v0.6 (default port: 11211, color: on, refresh: 3 seconds)
INSTANCE USAGE HIT % CONN TIME EVICT/s READ/s WRITE/s
127.0.0.1:11211 88.9% 86.9% 26 0.6ms 0.7 181.3K 3.3M
AVERAGE: 88.9% 86.9% 26 0.6ms 0.7 181.3K 3.3M
TOTAL: 4.3GB/ 4.9GB 26 0.6ms 0.7 181.3K 3.3M
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But memcached works OK, because nginx get data from it successfully.
Why spy-memcached can hangs ?
Thanks in advance.
Original issue reported on code.google.com by JohnBa...@gmail.com on 2 Nov 2012 at 1:13
Original issue reported on code.google.com by
JohnBa...@gmail.comon 2 Nov 2012 at 1:13