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Date: Mon, 9 Jan 2012 01:30:18 -0800
Message-ID: <CAKYjr2BtJvGYNdcs9D9ZtAaMQEpyc5xHH3nUqm7jXZobMOe...@mail.gmail.com>
Subject: Re: [project-voldemort] error Lock expired
From: Alex Feinberg <feinb...@gmail.com>
To: project-voldemort@googlegroups.com
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Some lock contention errors are normal.

It should be a number that is price, but less than the number of
threads that is accessing bdb at the same time.

Are you using the blocking I/O or the NIO connector?

- af


On Fri, Jan 6, 2012 at 9:26 AM, Greg Moulliet <gr...@conducivetech.com> wro=
te:
> You want to increase bdb.lock.nLockTables in server.properties.
> The default value is 1, which you can find in VoldemortConfig.
> Ours is set to 31. =A0I found a reference saying this should value in
> bdb should be a prime, though I'm not finding that page at the moment.
>
> On Fri, Jan 6, 2012 at 5:46 AM, Denis Zinevich <l...@ngc.net.ua> wrote:
>> Hi all,
>>
>> I'm constantly getting such errors:
>>
>> 13:42:54,277 ERROR BdbStorageEngine:323 - com.sleepycat.je.LockTimeoutEx=
ception: (JE 4.0.92) Lock expired. Locker 695683322 141326253_voldemort-ser=
ver-305_Txn: waited for lock on database=3Dserved-counts-data LockAddr:1911=
923530 node=3D142549379 type=3DWRITE grant=3DWAIT_NEW timeoutMillis=3D500 s=
tartTime=3D1325857373753 endTime=3D1325857374255
>> Owners: [<LockInfo locker=3D"1429195566 141326256_voldemort-server-106_T=
xn" type=3D"WRITE"/>]
>> Waiters: [<LockInfo locker=3D"1448618586 141326254_voldemort-server-230_=
Txn" type=3D"WRITE"/>]
>>
>> 13:42:54,277 ERROR BdbStorageEngine:323 - com.sleepycat.je.LockTimeoutEx=
ception: (JE 4.0.92) Lock expired. Locker 1255157229 141326252_voldemort-se=
rver-195_Txn: waited for lock on database=3Dserved-counts-data LockAddr:191=
1923530 node=3D142549379 type=3DWRITE grant=3DWAIT_NEW timeoutMillis=3D500 =
startTime=3D1325857373753 endTime=3D1325857374255
>> Owners: [<LockInfo locker=3D"1429195566 141326256_voldemort-server-106_T=
xn" type=3D"WRITE"/>]
>> Waiters: []
>>
>>
>> Does anyone have an idea how to diagnose/fix ?
>>
>> Thanks.
>>
>> --
>> Denis
>>
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