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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: Replaying of HLog
Date Thu, 04 Jun 2009 16:35:07 GMT
Clint,

Don't dig too deep, META edits will always be missed until we can
flush every edits.

J-D

On Thu, Jun 4, 2009 at 12:31 PM, Clint Morgan <cm-public@troove.net> wrote:
> I the meta edits did not get applied correctly. The only changes were
> region->server assignments, and after replay it still had the old
> assignments.
>
> I had made one explicit change to another table before the hard restart, and
> that change did not get recovered either.
>
> I'll dig deeper today...
> -clint
>
> On Wed, Jun 3, 2009 at 7:22 PM, stack <stack@duboce.net> wrote:
>
>> On Wed, Jun 3, 2009 at 5:53 PM, Clint Morgan <cm-public@troove.net> wrote:
>>
>> > Which seems weird because the hlog path points to a table's directory
>> which
>> > is a different table than the given region. Does this seem right?
>> >
>> >
>> No.  It seems badly wrong.  I took a quick look at HLog#splitLog and how
>> its
>> making up name of the file to write to.  I don't see anything obvious.  Its
>> using the HLogKey it got out of the commit log.  This in turn looks like it
>> has right table name going in -- it gets it from region whose commit is
>> being logged.
>>
>> I see in below that it made queues for -ROOT- and .META.   Did these edits
>> get split into the right location?
>>
>> St.Ack
>>
>>
>>
>> > A larger portion of the log is below.
>> >
>> > [03/06/09 16:35:34] 530059 [        HMaster] INFO
>> > hadoop.hbase.regionserver.HLog  - Splitting 1 log(s) in
>> > file:/opt/troove-data/hadoop/hbase/log_10.0.1.196_1244071611670_7802
>> > [03/06/09 16:35:34] 530060 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Splitting hlog 1 of 1:
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/log_10.0.1.196_1244071611670_7802/hlog.dat.1244071612170,
>> > length=45056
>> > [03/06/09 16:35:35] 530106 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for -ROOT-,,0
>> > [03/06/09 16:35:35] 530110 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for .META.,,1
>> > [03/06/09 16:35:35] 530120 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for
>> > TransactionStatus,,1244059490418
>> > [03/06/09 16:35:35] 530121 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for
>> > net_troove_coin_project_Project,,1244059485284
>> > [03/06/09 16:35:35] 530122 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for
>> > net_troove_security_ApplicationUser,,1244059486102
>> > [03/06/09 16:35:35] 530124 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for
>> > net_troove_coin_timeexpense_BaseLog,,1244059487257
>> > [03/06/09 16:35:35] 530124 [        HMaster] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Adding queue for
>> >
>> net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING,,1244059487520
>> > [03/06/09 16:35:35] 530133 [pool-1-thread-1] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 2 to process
>> > [03/06/09 16:35:35] 530137 [pool-1-thread-3] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 7 to process
>> > [03/06/09 16:35:35] 530137 [pool-1-thread-2] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 220 to process
>> > [03/06/09 16:35:35] 530144 [pool-1-thread-4] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 1 to process
>> > [03/06/09 16:35:35] 530149 [pool-1-thread-5] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 18 to process
>> > [03/06/09 16:35:35] 530157 [pool-1-thread-6] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 10 to process
>> > [03/06/09 16:35:35] 530209 [pool-1-thread-7] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Thread got 10 to process
>> > [03/06/09 16:35:35] 530325 [pool-1-thread-3] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/228384672/oldlogfile.log
>> > and region TransactionStatus,,1244059490418
>> > [03/06/09 16:35:35] 530326 [pool-1-thread-3] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Applied 7 total edits to
>> > TransactionStatus,,1244059490418 in 187ms
>> > [03/06/09 16:35:35] 530328 [pool-1-thread-1] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/70236052/oldlogfile.log
>> > and region -ROOT-,,0
>> > [03/06/09 16:35:35] 530328 [pool-1-thread-5] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/767391690/oldlogfile.log
>> > and region net_troove_coin_timeexpense_BaseLog,,1244059487257
>> > [03/06/09 16:35:35] 530329 [pool-1-thread-5] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Applied 18 total edits to
>> > net_troove_coin_timeexpense_BaseLog,,1244059487257 in 173ms
>> > [03/06/09 16:35:35] 530329 [pool-1-thread-6] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/364454454/oldlogfile.log
>> > and region
>> >
>> net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING,,1244059487520
>> > [03/06/09 16:35:35] 530329 [pool-1-thread-6] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Applied 10 total edits to
>> >
>> net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING,,1244059487520
>> > in 154ms
>> > [03/06/09 16:35:35] 530330 [pool-1-thread-2] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/1028785192/oldlogfile.log
>> > and region .META.,,1
>> > [03/06/09 16:35:35] 530328 [pool-1-thread-4] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/124273138/oldlogfile.log
>> > and region net_troove_coin_project_Project,,1244059485284
>> > [03/06/09 16:35:35] 530331 [pool-1-thread-4] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Applied 1 total edits to
>> > net_troove_coin_project_Project,,1244059485284 in 187ms
>> > [03/06/09 16:35:35] 530330 [pool-1-thread-7] DEBUG
>> > hadoop.hbase.regionserver.HLog  - Creating new hlog file writer for path
>> >
>> >
>> file:/opt/troove-data/hadoop/hbase/net_troove_coin_timeexpense_BaseLog-Base_Employee_ASCENDING/395668855/oldlogfile.log
>> > and region net_troove_security_ApplicationUser,,1244059486102
>> >
>>
>

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