On 2016-08-28 16:47 Nicola Scendoni wrote:
Hi all,
Following error appears intermittently during junit tests. I have seen
this
error on different tests, not only on PullTaskITCase.
Do you have some idea?
Hi Nicola,
you are unfortunately right: I am also experiencing similar troubles -
and it also happens sometimes with Travis CI's [1] and my company
Jenkins's [2] jobs.
I have recently spent some time in trying to track such problem, but I
could not find any way to consistently reproduce it; I could only find
the place (in OpenJPA's code) where the exception is raised [3].
It also seems that this commit [4] reduced the frequency of the problem
to occur during Java EE container startup [4]
I have also tried to follow the exception message's suggestion, e.g. to
set the `openjpa.Multithreaded property to true`, but things worsened.
Any suggestion is naturally welcome :-)
Regards.
[1] https://travis-ci.org/apache/syncope
[2] http://jenkins.tirasa.net/job/ApacheSyncopeMaster/
[3]
https://github.com/apache/openjpa/blob/2.4.x/openjpa-kernel/src/main/java/org/apache/openjpa/kernel/BrokerImpl.java#L1987
[4]
https://github.com/apache/syncope/commit/89ef5169158a6ea3c71e3d305c4389ded3496c5a
Tests run: 18, Failures: 0, Errors: 1, Skipped: 0, Time elapsed:
206.382
sec <<< FAILURE! - in org.apache.syncope.fit.core.PullTaskITCase
issueSYNCOPE313LDAP(org.apache.syncope.fit.core.PullTaskITCase) Time
elapsed: 1.622 sec <<< ERROR!
org.apache.syncope.common.lib.SyncopeClientException: Unknown
[PersistenceException: Multiple concurrent threads attempted to access
a
single broker. By default brokers are not thread safe; if you require
and/or intend a broker to be accessed by more than one thread, set the
openjpa.Multithreaded property to true to override the default
behavior.]
at
org.apache.syncope.fit.core.PullTaskITCase.ldapCleanup(PullTaskITCase.java:369)
at
org.apache.syncope.fit.core.PullTaskITCase.issueSYNCOPE313LDAP(PullTaskITCase.java:993)
--
Francesco Chicchiriccò
Tirasa - Open Source Excellence
http://www.tirasa.net/
Involved at The Apache Software Foundation:
member, Syncope PMC chair, Cocoon PMC, Olingo PMC,
CXF Committer, OpenJPA Committer, PonyMail PPMC
http://home.apache.org/~ilgrosso/
