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https://issues.apache.org/jira/browse/ZOOKEEPER-4858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17879993#comment-17879993
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Li Wang commented on ZOOKEEPER-4858:
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Will submit the patch.
> Remove the lock contention between snapshotting and the sync operation
> ----------------------------------------------------------------------
>
> Key: ZOOKEEPER-4858
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4858
> Project: ZooKeeper
> Issue Type: Improvement
> Components: server
> Affects Versions: 3.9.0, 3.9.1, 3.9.2
> Reporter: Li Wang
> Assignee: Li Wang
> Priority: Major
>
> Remove the synchronized keyword from Zookeeper.takeSnapshot() and
> ZookeeperServer.restoreFromSnapshot() API, as it can cause lock contention
> with the sync operation.
> {code:java}
> public File takeSnapshot(boolean syncSnap, boolean isSevere, boolean
> fastForwardFromEdits) throws IOException {
> ....
> }
> {code}
>
> {code:java}
> public synchronized void sync() {
> ...
> }
> {code}
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