[jira] [Updated] (KUDU-1682) Lock contention on table locations cache in Java client
[ https://issues.apache.org/jira/browse/KUDU-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] 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=0x7f2300391000 nid=0xfb2 waiting for > monitor entry [0x7f229a452000] >java.lang.Thread.State: BLOCKED (on object monitor) > at > org.apache.kudu.client.TableLocationsCache.get(TableLocationsCache.java:62) > - locked <0x0001da767c78> (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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (KUDU-1682) Lock contention on table locations cache in Java client
[ https://issues.apache.org/jira/browse/KUDU-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Todd Lipcon updated KUDU-1682: -- Priority: Minor (was: Major) > 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 >Priority: Minor > > 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=0x7f2300391000 nid=0xfb2 waiting for > monitor entry [0x7f229a452000] >java.lang.Thread.State: BLOCKED (on object monitor) > at > org.apache.kudu.client.TableLocationsCache.get(TableLocationsCache.java:62) > - locked <0x0001da767c78> (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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)