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https://issues.apache.org/jira/browse/KUDU-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jean-Daniel Cryans updated KUDU-1682:
-------------------------------------
Code Review: https://gerrit.cloudera.org/#/c/4706/
> Lock contention on table locations cache in Java client
> -------------------------------------------------------
>
> Key: KUDU-1682
> URL: https://issues.apache.org/jira/browse/KUDU-1682
> Project: Kudu
> Issue Type: Bug
> Components: client, perf
> Affects Versions: 1.0.0
> Reporter: Todd Lipcon
> Assignee: Jean-Daniel Cryans
> Priority: Minor
> Fix For: 1.1.0
>
>
> Running YCSB with 16 threads, I see a lot of contention on the table
> locations cache:
> {code}
> "Thread-15" #36 prio=5 os_prio=0 tid=0x00007f2300391000 nid=0xfb2 waiting for
> monitor entry [0x00007f229a452000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.kudu.client.TableLocationsCache.get(TableLocationsCache.java:62)
> - locked <0x00000001da767c78> (a java.lang.Object)
> at
> org.apache.kudu.client.AsyncKuduClient.getTableLocationEntry(AsyncKuduClient.java:1429)
> at
> org.apache.kudu.client.AsyncKuduClient.loopLocateTable(AsyncKuduClient.java:1184)
> at
> org.apache.kudu.client.AsyncKuduClient.locateTable(AsyncKuduClient.java:1240)
> at
> org.apache.kudu.client.AsyncKuduClient.getTabletLocation(AsyncKuduClient.java:1449)
> {code}
> Since this changes rarely, we should make it a read-write lock.
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