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Posted to derby-dev@db.apache.org by "Mike Matrigali (Updated) (JIRA)" <ji...@apache.org> on 2012/02/21 08:59:32 UTC
[jira] [Updated] (DERBY-3785) Race conditions on Field
mon_numWritesToLog in class
org/apache/derby/impl/store/raw/log/LogAccessFile
[ https://issues.apache.org/jira/browse/DERBY-3785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mike Matrigali updated DERBY-3785:
----------------------------------
Labels: derby_triage10_5_2 derby_triage10_9 (was: derby_triage10_5_2)
Summary: Race conditions on Field mon_numWritesToLog in class org/apache/derby/impl/store/raw/log/LogAccessFile (was: Race conditions on Field mon_numWritesToLog in class org/apache/derby/impl/store/raw/log/LogAccessFile
)
Triaged for 10.9, no changes.
> Race conditions on Field mon_numWritesToLog in class org/apache/derby/impl/store/raw/log/LogAccessFile
> -------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3785
> URL: https://issues.apache.org/jira/browse/DERBY-3785
> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.3.3.0
> Environment: Linux/X86
> Reporter: Yao Qi
> Priority: Minor
> Labels: derby_triage10_5_2, derby_triage10_9
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> Our dynamic race detection tool found one race condition in derby 10.4. Even that code is for debugging/statistics, we still believe that it is a bug, and should be fixed.
> Data Race 8 : 14109 : org/apache/derby/impl/store/raw/log/LogAccessFile : mon_numWritesToLog
> Thread DRDAConnThread_12 id: 20 : WRITE
> Lock Set : [ 966(org/apache/derby/impl/jdbc/EmbedConnection30), ]
> [org.apache.derby.impl.store.raw.log.LogAccessFile : writeToLog : 805]
> [org.apache.derby.impl.store.raw.log.LogAccessFile : flushDirtyBuffers : 534]
> [org.apache.derby.impl.store.raw.log.LogToFile : flush : 4015]
> [org.apache.derby.impl.store.raw.log.LogToFile : flush : 1777]
> [org.apache.derby.impl.store.raw.data.BaseDataFileFactory : flush : 1369]
> [org.apache.derby.impl.store.raw.data.BaseDataFileFactory : addContainer : 862]^M
> [org.apache.derby.impl.store.raw.xact.Xact : addContainer : 1329]
> [org.apache.derby.impl.store.access.heap.Heap : create : 274]
> [org.apache.derby.impl.store.access.heap.HeapConglomerateFactory : createConglomerate : 195]
> [org.apache.derby.impl.store.access.RAMTransaction : createConglomerate : 826]
> [org.apache.derby.impl.sql.execute.CreateTableConstantAction : executeConstantAction : 201]
> [org.apache.derby.impl.sql.execute.MiscResultSet : open : 64]
> [org.apache.derby.impl.sql.GenericPreparedStatement : execute : 372]
> [org.apache.derby.impl.jdbc.EmbedStatement : executeStatement : 1235]
> [org.apache.derby.impl.jdbc.EmbedStatement : execute : 625]
> [org.apache.derby.impl.jdbc.EmbedStatement : executeUpdate : 175]
> [org.apache.derby.impl.drda.DRDAConnThread : parseEXCSQLIMM : 4940]
> [org.apache.derby.impl.drda.DRDAConnThread : processCommands : 739]
> [org.apache.derby.impl.drda.DRDAConnThread : run : 279]
> Thread DRDAConnThread_9 id: 16 : READ
> Lock Set : [ 968(org/apache/derby/impl/jdbc/EmbedConnection30), ]
> Vector Clock : [ 0 2 0 0 0 0 0 0 0 0 0 0 0 0 3 3 6 ]
> [org.apache.derby.impl.store.raw.log.LogAccessFile : writeToLog : 805]
> [org.apache.derby.impl.store.raw.log.LogAccessFile : flushDirtyBuffers : 534]
> [org.apache.derby.impl.store.raw.log.LogToFile : flush : 4015]
> [org.apache.derby.impl.store.raw.log.LogToFile : flush : 1777]
> [org.apache.derby.impl.store.raw.data.BaseDataFileFactory : flush : 1369]
> [org.apache.derby.impl.store.raw.data.BaseDataFileFactory : addContainer : 862]
> [org.apache.derby.impl.store.raw.xact.Xact : addContainer : 1329]
> [org.apache.derby.impl.store.access.heap.Heap : create : 274]
> [org.apache.derby.impl.store.access.heap.HeapConglomerateFactory : createConglomerate : 195]
> [org.apache.derby.impl.store.access.RAMTransaction : createConglomerate : 826]
> [org.apache.derby.impl.sql.execute.CreateTableConstantAction : executeConstantAction : 201]
> [org.apache.derby.impl.sql.execute.MiscResultSet : open : 64]
> [org.apache.derby.impl.sql.GenericPreparedStatement : execute : 372]
> [org.apache.derby.impl.jdbc.EmbedStatement : executeStatement : 1235]
> [org.apache.derby.impl.jdbc.EmbedStatement : execute : 625]
> [org.apache.derby.impl.jdbc.EmbedStatement : executeUpdate : 175]
> [org.apache.derby.impl.drda.DRDAConnThread : parseEXCSQLIMM : 4940]
> [org.apache.derby.impl.drda.DRDAConnThread : processCommands : 739]
> [org.apache.derby.impl.drda.DRDAConnThread : run : 279]
> if (SanityManager.DEBUG)
> {
> mon_numWritesToLog++; <-- line 805,
> mon_numBytesToLog += len;
> }
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