timmylicheng commented on issue #89: HDDS-2322. DoubleBuffer flush termination and OM shutdown's after that. Make entry returned from cache a new copy. URL: https://github.com/apache/hadoop-ozone/pull/89#issuecomment-546816112 https://issues.apache.org/jira/browse/HDDS-2356 issue happens here as well. From the stack I got, it looks like it may also be related to partKeyInfoList as TreeMap in OmMultipartKeyInfo.java being not thread safe. I may have little background knowledge here, but from the logs I got after running in actual env, it shows some other errors in https://issues.apache.org/jira/browse/HDDS-2356. I wonder if we need to stay with TreeMap as a data structure since it's hard to make TreeMap thread safe.
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