Eli Collins created HDFS-4035:
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Summary: LightWeightGSet and LightWeightHashSet increment a
volatile without synchronization
Key: HDFS-4035
URL: https://issues.apache.org/jira/browse/HDFS-4035
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: 2.0.0-alpha
Reporter: Eli Collins
Assignee: Eli Collins
LightWeightGSet and LightWeightHashSet have a volatile modification field that
they use to detect updates while iterating so they can throw a
ConcurrentModificationException. Since these "LightWeight" classes are
explicitly "not thread safe" (eg access to their members is not synchronized)
then the current use is OK, we just need to update findbugsExcludeFile.xml to
exclude them.
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