Ahmet Arslan created CONNECTORS-734:
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Summary: EXPLAIN may require retry
Key: CONNECTORS-734
URL: https://issues.apache.org/jira/browse/CONNECTORS-734
Project: ManifoldCF
Issue Type: Bug
Affects Versions: ManifoldCF 1.2
Environment: java version "1.6.0_31" Java HotSpot(TM) 64-Bit Server VM
(build 20.6-b01)
Red Hat Enterprise Linux Server release 5.7 (Tikanga)
PostgreSQL version 9.2.8 running on Scientific Linux release 6.2 (Carbon)
Reporter: Ahmet Arslan
{code}
ERROR 2013-06-24 10:39:33,473 (Worker thread '1') - Explain failed with error
Database exception: SQLException doing query (40001): ERROR: could not
serialize access due to read/write dependencies among transactions
Detail: Reason code: Canceled on identification as a pivot, during conflict
out checking.
Hint: The transaction might succeed if retried.
org.apache.manifoldcf.core.interfaces.ManifoldCFException: Database exception:
SQLException doing query (40001): ERROR: could not serialize access due to
read/write dependencies among transactions
Detail: Reason code: Canceled on identification as a pivot, during conflict
out checking.
Hint: The transaction might succeed if retried.
at
org.apache.manifoldcf.core.database.Database.executeViaThread(Database.java:717)
at
org.apache.manifoldcf.core.database.Database.executeUncachedQuery(Database.java:745)
at
org.apache.manifoldcf.core.database.DBInterfacePostgreSQL.explainQuery(DBInterfacePostgreSQL.java:1233)
at
org.apache.manifoldcf.core.database.Database$QueryCacheExecutor.create(Database.java:1449)
at
org.apache.manifoldcf.core.cachemanager.CacheManager.findObjectsAndExecute(CacheManager.java:144)
at
org.apache.manifoldcf.core.database.Database.executeQuery(Database.java:186)
at
org.apache.manifoldcf.core.database.DBInterfacePostgreSQL.performQuery(DBInterfacePostgreSQL.java:822)
at
org.apache.manifoldcf.crawler.jobs.JobManager.addDocuments(JobManager.java:4148)
at
org.apache.manifoldcf.crawler.system.WorkerThread$ProcessActivity.processDocumentReferences(WorkerThread.java:2017)
at
org.apache.manifoldcf.crawler.system.WorkerThread$ProcessActivity.flush(WorkerThread.java:1948)
at
org.apache.manifoldcf.crawler.system.WorkerThread.run(WorkerThread.java:562)
Caused by: org.postgresql.util.PSQLException: ERROR: could not serialize access
due to read/write dependencies among transactions
Detail: Reason code: Canceled on identification as a pivot, during conflict
out checking.
Hint: The transaction might succeed if retried.
at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2102)
at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1835)
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)
at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:500)
at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:388)
at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:273)
at
org.apache.manifoldcf.core.database.Database.execute(Database.java:862)
at
org.apache.manifoldcf.core.database.Database$ExecuteQueryThread.run(Database.java:677)
{code}
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