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Konstantin Shvachko commented on HDFS-1112: ------------------------------------------- Per discussion with Hairong, since logEdits() happens under FSNamesystem lock, isAutoSyncScheduled should be set and reset by the same thread within one name-node operation, therefore other threads do not need to wait on isAutoSyncScheduled as they will wait on FSNamesystem lock. +1 code looks good. > Edit log buffer should not grow unboundedly > ------------------------------------------- > > Key: HDFS-1112 > URL: https://issues.apache.org/jira/browse/HDFS-1112 > Project: Hadoop HDFS > Issue Type: Bug > Components: name-node > Affects Versions: 0.22.0 > Reporter: Hairong Kuang > Assignee: Hairong Kuang > Fix For: 0.22.0 > > Attachments: editLogBuf.patch, editLogBuf1.patch, editLogBuf2.patch, > editLogBuf3.patch > > > Currently HDFS does not impose an upper limit on the edit log buffer. In case > there are a large number of open operations coming in with access time update > on, since open does not call sync automatically, there is a possibility that > the buffer grow to a large size, therefore causes memory leak and full GC in > extreme cases as described in HDFS-1104. > The edit log buffer should be automatically flushed when the buffer becomes > full. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.