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https://issues.apache.org/jira/browse/CONNECTORS-299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Karl Wright updated CONNECTORS-299:
-----------------------------------
Description:
The hang takes place because of this postgresql error:
ERROR 2011-11-28 14:46:23,959 (Worker thread '25') - Worker thread aborting and
restarting due to database connection reset: Database exception: Exception
doing query: ERROR: could not serialize access due to read/write dependencies
among transactions
Detail: Reason code: Canceled on identification as a pivot, during commit
attempt.
Hint: The transaction might succeed if retried.
org.apache.manifoldcf.core.interfaces.ManifoldCFException: Database exception:
Exception doing query: ERROR: could not serialize access due to read/write
dependencies among transactions
Detail: Reason code: Canceled on identification as a pivot, during commit
attempt.
Hint: The transaction might succeed if retried.
at
org.apache.manifoldcf.core.database.Database.executeViaThread(Database.java:608)
at
org.apache.manifoldcf.core.database.DBInterfacePostgreSQL.commitCurrentTransaction(DBInterfacePostgreSQL.java:1141)
at
org.apache.manifoldcf.core.database.Database.endTransaction(Database.java:321)
at
org.apache.manifoldcf.core.database.DBInterfacePostgreSQL.endTransaction(DBInterfacePostgreSQL.java:1112)
at
org.apache.manifoldcf.crawler.jobs.JobManager.finishDocuments(JobManager.java:4072)
at
org.apache.manifoldcf.crawler.system.WorkerThread.run(WorkerThread.java:567)
Caused by: org.postgresql.util.PSQLException: ERROR: could not serialize access
due to read/write dependencies among transactions
This is happening during the commit phase of the transaction, at a point where
none of the transaction blocks in ManifoldCF know to look for it. It is
therefore likely that all transaction blocks throughout ManifoldCF that deal
with deadlock will need to be changed.
was:
The hang takes place because of this postgresql error:
---- message: ERROR: could not serialize access due to read/write dependencies
among transactions
Detail: Reason code: Canceled on identification as a pivot, during conflict
in checking.
Hint: The transaction might succeed if retried., ----- state: 40001
The state code 40001 should be interpreted as a "deadlock" so that the
transaction is retried.
> Crawling using Postgresql 9.1 hangs occasionally for a while
> ------------------------------------------------------------
>
> Key: CONNECTORS-299
> URL: https://issues.apache.org/jira/browse/CONNECTORS-299
> Project: ManifoldCF
> Issue Type: Bug
> Components: Framework core
> Affects Versions: ManifoldCF 0.4
> Reporter: Karl Wright
> Assignee: Karl Wright
> Fix For: ManifoldCF 0.4
>
>
> The hang takes place because of this postgresql error:
> ERROR 2011-11-28 14:46:23,959 (Worker thread '25') - Worker thread aborting
> and restarting due to database connection reset: Database exception:
> Exception doing query: ERROR: could not serialize access due to read/write
> dependencies among transactions
> Detail: Reason code: Canceled on identification as a pivot, during commit
> attempt.
> Hint: The transaction might succeed if retried.
> org.apache.manifoldcf.core.interfaces.ManifoldCFException: Database
> exception: Exception doing query: ERROR: could not serialize access due to
> read/write dependencies among transactions
> Detail: Reason code: Canceled on identification as a pivot, during commit
> attempt.
> Hint: The transaction might succeed if retried.
> at
> org.apache.manifoldcf.core.database.Database.executeViaThread(Database.java:608)
> at
> org.apache.manifoldcf.core.database.DBInterfacePostgreSQL.commitCurrentTransaction(DBInterfacePostgreSQL.java:1141)
> at
> org.apache.manifoldcf.core.database.Database.endTransaction(Database.java:321)
> at
> org.apache.manifoldcf.core.database.DBInterfacePostgreSQL.endTransaction(DBInterfacePostgreSQL.java:1112)
> at
> org.apache.manifoldcf.crawler.jobs.JobManager.finishDocuments(JobManager.java:4072)
> at
> org.apache.manifoldcf.crawler.system.WorkerThread.run(WorkerThread.java:567)
> Caused by: org.postgresql.util.PSQLException: ERROR: could not serialize
> access due to read/write dependencies among transactions
> This is happening during the commit phase of the transaction, at a point
> where none of the transaction blocks in ManifoldCF know to look for it. It is
> therefore likely that all transaction blocks throughout ManifoldCF that deal
> with deadlock will need to be changed.
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