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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2019/08/24 15:21:40 UTC

[GitHub] [incubator-druid] xvrl opened a new pull request #8391: Fix ConcurrentModificationException in JDK11

xvrl opened a new pull request #8391: Fix ConcurrentModificationException in JDK11
URL: https://github.com/apache/incubator-druid/pull/8391
 
 
   When building column/dimension selectors, calling computeIfAbsent can
   cause the applied function to modify the same cache through virtual
   column references. The JDK11 map implementation detects this change and
   will throw an exception.
   
   This fix – while not as elegant – breaks the single call into two
   steps to avoid this problem.
   
   relates to #5589 

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