[jira] [Created] (HDFS-7261) storageMap is accessed without synchronization in DatanodeDescriptor#updateHeartbeatState()

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created HDFS-7261:
----------------------------

             Summary: storageMap is accessed without synchronization in DatanodeDescriptor#updateHeartbeatState()
                 Key: HDFS-7261
                 URL: https://issues.apache.org/jira/browse/HDFS-7261
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


Here is the code:
{code}
      failedStorageInfos = new HashSet<DatanodeStorageInfo>(
          storageMap.values());
{code}
In other places, the lock on "DatanodeDescriptor.storageMap" is held:
{code}
    synchronized (storageMap) {
      final Collection<DatanodeStorageInfo> storages = storageMap.values();
      return storages.toArray(new DatanodeStorageInfo[storages.size()]);
    }
{code}



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