Jian Feng created HUDI-3645:
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Summary: fix NPE caused by multiple threads accessing
non-thread-safe HashMap
Key: HUDI-3645
URL: https://issues.apache.org/jira/browse/HUDI-3645
Project: Apache Hudi
Issue Type: Bug
Reporter: Jian Feng
When users use presto to query hudi tables. I found a NullPointerException
seems caused by multiple threads accessing non-thread-safe HashMap. after
changed to ConcurrentHashmap this error doesn't happen again
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