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Xuesen Liang updated HADOOP-17757: ---------------------------------- Parent: HADOOP-17751 Issue Type: Sub-task (was: Improvement) > Reduce lock contention in properties of Configuration > ----------------------------------------------------- > > Key: HADOOP-17757 > URL: https://issues.apache.org/jira/browse/HADOOP-17757 > Project: Hadoop Common > Issue Type: Sub-task > Components: common > Reporter: Xuesen Liang > Priority: Major > > The *properties* field of class *Configuration* is guard by _synchronized_, > and its type java.util.Property is a sub class of java.util.*Hashtable*, > which methods are all synchronized. These are bad for multithread performance. > The properties field should be replaced by a *HashMap<String, String>* with a > *ReentrantReadWriteLock*, then all _get()_ related operations can be parallel > guard by ReadLock, and _set/load_ operations can be guard by WriteLock. This > is better for performance. > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org