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https://issues.apache.org/jira/browse/HDFS-11850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16019839#comment-16019839
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Chen Liang commented on HDFS-11850:
-----------------------------------
Thanks [~msingh] for working on this! v001 patch LGTM, will commit this shortly.
> Ozone: Stack Overflow in XceiverClientManager because of race condition in
> accessing openClient
> -----------------------------------------------------------------------------------------------
>
> Key: HDFS-11850
> URL: https://issues.apache.org/jira/browse/HDFS-11850
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Attachments: HDFS-11850-HDFS-7240.001.patch
>
>
> There is a possible race condition in accessing the open client has, it is
> because of unlocked access of the hash in acquireClient.
> This can cause stack overflow and also leaking client in all probabilities
> {code}
> at
> com.google.common.cache.LocalCache$Segment.put(LocalCache.java:3019)
> at com.google.common.cache.LocalCache.put(LocalCache.java:4365)
> at
> com.google.common.cache.LocalCache$LocalManualCache.put(LocalCache.java:5077)
> at
> org.apache.hadoop.scm.XceiverClientManager$1.onRemoval(XceiverClientManager.java:85)
> at
> com.google.common.cache.LocalCache.processPendingNotifications(LocalCache.java:1966)
> at
> com.google.common.cache.LocalCache$Segment.runUnlockedCleanup(LocalCache.java:3650)
> at
> com.google.common.cache.LocalCache$Segment.postWriteCleanup(LocalCache.java:3626)
> at
> com.google.common.cache.LocalCache$Segment.put(LocalCache.java:3019)
> at com.google.common.cache.LocalCache.put(LocalCache.java:4365)
> at
> com.google.common.cache.LocalCache$LocalManualCache.put(LocalCache.java:5077)
> at
> org.apache.hadoop.scm.XceiverClientManager$1.onRemoval(XceiverClientManager.java:85)
> at
> com.google.common.cache.LocalCache.processPendingNotifications(LocalCache.java:1966)
> at
> com.google.common.cache.LocalCache$Segment.runUnlockedCleanup(LocalCache.java:3650)
> at
> com.google.common.cache.LocalCache$Segment.postWriteCleanup(LocalCache.java:3626)
> at
> com.google.common.cache.LocalCache$Segment.put(LocalCache.java:3019)
> at com.google.common.cache.LocalCache.put(LocalCache.java:4365)
> at
> com.google.common.cache.LocalCache$LocalManualCache.put(LocalCache.java:5077)
> at
> org.apache.hadoop.scm.XceiverClientManager$1.onRemoval(XceiverClientManager.java:85)
> at
> com.google.common.cache.LocalCache.processPendingNotifications(LocalCache.java:1966)
> at
> com.google.common.cache.LocalCache$Segment.runUnlockedCleanup(LocalCache.java:3650)
> {code}
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