[JBoss JIRA] (JBTM-2159) It is possible for the CommitMarkableResource recovery manager to attempt to activate an AtomicAction while it is being committed which can cause filenotfoundstacktrace and NullPointerException
2:10 a.m.
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https://issues.jboss.org/browse/JBTM-2159?page=com.atlassian.jira.plugin....
]
Tom Jenkinson edited comment on JBTM-2159 at 4/28/14 3:09 AM:
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Yeah, it was a race condition but it turns out it only is known to affect
CommitMarkableResources, I raised a PR for it over
https://github.com/jbosstm/narayana/pull/644/files. I will update the subject. It fixes
the NPE.
The thing I am not sure of is how the FileNotFoundException could be possible. When I look
into the file locking code, when we delete the file on disk it should have a read lock,
read_state should aquire a read lock on the file and if it can't it should have a null
fd:
https://github.com/tomjenkinson/narayana/blob/BZ1089251/ArjunaCore/arjuna...
was (Author: tomjenkinson):
Yeah, it was a race condition but it turns out it only is known to affect
CommitMarkableResources, I raised a PR for it over here. I will update the subject.
It is possible for the CommitMarkableResource recovery manager to
attempt to activate an AtomicAction while it is being committed which can cause
filenotfoundstacktrace and NullPointerException
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Key: JBTM-2159
URL: https://issues.jboss.org/browse/JBTM-2159
Project: JBoss Transaction Manager
Issue Type: Enhancement
Security Level: Public(Everyone can see)
Components: Recovery
Reporter: Tom Jenkinson
Assignee: Tom Jenkinson
Basically:
1. App thread creates AA
2. AA UID is seen in phase1 recovery thread by CommitMarkableResourceRecoveryModule
3. App thread commits AA
4. App thread deletes AA UID
5. Recovery thread tries to activate AA with UID in CommitMarkableResourceRecoveryModule
but it gets exceptions as shown here:
12:23:07 [0m[33m12:23:07,915 WARN [com.arjuna.ats.arjuna] (Periodic Recovery) Could
not query objectstore: : java.io.IOException: java.lang.NullPointerException
12:23:07 at com.arjuna.ats.arjuna.StateManager.unpackHeader(StateManager.java:732)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
12:23:07 at
com.arjuna.ats.internal.jta.recovery.arjunacore.RecoverConnectableAtomicAction.<init>(RecoverConnectableAtomicAction.java:52)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
12:23:07 at
com.arjuna.ats.internal.jta.recovery.arjunacore.CommitMarkableResourceRecordRecoveryModule.periodicWorkFirstPass(CommitMarkableResourceRecordRecoveryModule.java:379)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
12:23:07 at
com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.doWorkInternal(PeriodicRecovery.java:743)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
12:23:07 at
com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.run(PeriodicRecovery.java:371)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
12:23:07 Caused by: java.lang.NullPointerException
12:23:07 at com.arjuna.ats.arjuna.StateManager.unpackHeader(StateManager.java:697)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
12:23:07 ... 4 more
12:23:07
15:16:36 [0m[33m15:16:36,247 WARN [com.arjuna.ats.arjuna] (Periodic Recovery) Could
not query objectstore: : com.arjuna.ats.arjuna.exceptions.ObjectStoreException:
ShadowingStore::read_state error: java.io.FileNotFoundException:
/tmp/activemq-soak/ibm-mq-testsuite/src/test/config/activemq/install/target/jboss-eap/standalone/data/tx-object-store/ShadowNoFileLockStore/defaultStore/StateManager/BasicAction/TwoPhaseCoordinator/AtomicAction/0_ffff0a106418_-2b02421b_534ffd61_4c1764
(No such file or directory)
15:16:36 at
com.arjuna.ats.internal.arjuna.objectstore.ShadowingStore.read_state(ShadowingStore.java:412)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 at
com.arjuna.ats.internal.arjuna.objectstore.FileSystemStore.read_committed(FileSystemStore.java:98)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 at
com.arjuna.ats.internal.jta.recovery.arjunacore.RecoverConnectableAtomicAction.<init>(RecoverConnectableAtomicAction.java:48)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 at
com.arjuna.ats.internal.jta.recovery.arjunacore.CommitMarkableResourceRecordRecoveryModule.periodicWorkFirstPass(CommitMarkableResourceRecordRecoveryModule.java:379)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 at
com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.doWorkInternal(PeriodicRecovery.java:743)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 at
com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.run(PeriodicRecovery.java:371)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 Caused by: java.io.FileNotFoundException:
/tmp/activemq-soak/ibm-mq-testsuite/src/test/config/activemq/install/target/jboss-eap/standalone/data/tx-object-store/ShadowNoFileLockStore/defaultStore/StateManager/BasicAction/TwoPhaseCoordinator/AtomicAction/0_ffff0a106418_-2b02421b_534ffd61_4c1764
(No such file or directory)
15:16:36 at java.io.FileInputStream.open(Native Method) [rt.jar:1.7.0_51]
15:16:36 at java.io.FileInputStream.<init>(FileInputStream.java:146)
[rt.jar:1.7.0_51]
15:16:36 at
com.arjuna.ats.internal.arjuna.objectstore.ShadowingStore.read_state(ShadowingStore.java:406)
[jbossjts-jacorb-4.17.18.Final-redhat-1.jar:4.17.18.Final-redhat-1]
15:16:36 ... 5 more
15:16:36
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Tom Jenkinson (JIRA)