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Posted to issues@activemq.apache.org by "Michael Andre Pearce (JIRA)" <ji...@apache.org> on 2018/09/25 09:53:01 UTC

[jira] [Created] (ARTEMIS-2095) TypedProperties thread safety

Michael Andre Pearce created ARTEMIS-2095:
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             Summary: TypedProperties thread safety
                 Key: ARTEMIS-2095
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-2095
             Project: ActiveMQ Artemis
          Issue Type: Bug
            Reporter: Michael Andre Pearce
            Assignee: Michael Andre Pearce


Whilst TypedProperties is meant to have a single thread acting on it (and this is the most typical interaction), there are occurrences where, it can be acted on by other threads, when this occurs some concurrent modification errors can occur.

As such TypedProperties must be thread safe, but concurrency tuning should factor in to be most performant for single thread.

 

e.g. 

2018-09-24 15:01:27,751 WARN [org.apache.activemq.artemis.core.message.impl.CoreMessage] Error creating String for message: : java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437) [rt.jar:1.8.0_102] at java.util.HashMap$EntryIterator.next(HashMap.java:1471) [rt.jar:1.8.0_102] at java.util.HashMap$EntryIterator.next(HashMap.java:1469) [rt.jar:1.8.0_102] at org.apache.activemq.artemis.utils.collections.TypedProperties.toString(TypedProperties.java:464)



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