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  1. Hadoop HDFS
  2. HDFS-8883

NameNode Metrics : Add FSNameSystem lock Queue Length

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.7.1
    • Fix Version/s: 2.8.0, 2.7.4, 3.0.0-alpha1
    • Component/s: namenode
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      FSNameSystemLock can have contention when NameNode is under load. This patch adds LockQueueLength – the number of threads waiting on FSNameSystemLock – as a metric in NameNode.

        Issue Links

          Activity

          Hide
          zhz Zhe Zhang added a comment -

          Thanks Anu Engineer for the work. This is a pretty good improvement. I just backported to branch-2.7.

          Show
          zhz Zhe Zhang added a comment - Thanks Anu Engineer for the work. This is a pretty good improvement. I just backported to branch-2.7.
          Hide
          hudson Hudson added a comment -

          FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #280 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/280/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          Show
          hudson Hudson added a comment - FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #280 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/280/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          Hide
          hudson Hudson added a comment -

          FAILURE: Integrated in Hadoop-Hdfs-trunk #2218 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk/2218/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          Show
          hudson Hudson added a comment - FAILURE: Integrated in Hadoop-Hdfs-trunk #2218 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk/2218/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          Hide
          hudson Hudson added a comment -

          FAILURE: Integrated in Hadoop-Mapreduce-trunk #2237 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2237/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          Show
          hudson Hudson added a comment - FAILURE: Integrated in Hadoop-Mapreduce-trunk #2237 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2237/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          Hide
          hudson Hudson added a comment -

          FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #288 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/288/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          Show
          hudson Hudson added a comment - FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #288 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/288/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          Hide
          hudson Hudson added a comment -

          FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #291 (See https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/291/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          Show
          hudson Hudson added a comment - FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #291 (See https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/291/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          Hide
          hudson Hudson added a comment -

          FAILURE: Integrated in Hadoop-Yarn-trunk #1021 (See https://builds.apache.org/job/Hadoop-Yarn-trunk/1021/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          Show
          hudson Hudson added a comment - FAILURE: Integrated in Hadoop-Yarn-trunk #1021 (See https://builds.apache.org/job/Hadoop-Yarn-trunk/1021/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          Hide
          hudson Hudson added a comment -

          SUCCESS: Integrated in Hadoop-trunk-Commit #8313 (See https://builds.apache.org/job/Hadoop-trunk-Commit/8313/)
          HDFS-8883. NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a)

          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
          • hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
          • hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
          • hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
          • hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          Show
          hudson Hudson added a comment - SUCCESS: Integrated in Hadoop-trunk-Commit #8313 (See https://builds.apache.org/job/Hadoop-trunk-Commit/8313/ ) HDFS-8883 . NameNode Metrics : Add FSNameSystem lock Queue Length. Contributed by Anu Engineer. (xyao: rev a7862d5fe4c505f5d4b0c675438a971733f1f53a) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
          Hide
          xyao Xiaoyu Yao added a comment -

          Thanks Anu Engineer for the contribution. I've committed the patch to trunk and branch-2.

          Show
          xyao Xiaoyu Yao added a comment - Thanks Anu Engineer for the contribution. I've committed the patch to trunk and branch-2.
          Hide
          xyao Xiaoyu Yao added a comment -

          Thanks Anu Engineer for working on this.
          Patch LGTM. +1.

          Show
          xyao Xiaoyu Yao added a comment - Thanks Anu Engineer for working on this. Patch LGTM. +1.
          Hide
          anu Anu Engineer added a comment -

          None of the test failures seem to be related to this patch. Re-running them on my local machine does succeed.

          Show
          anu Anu Engineer added a comment - None of the test failures seem to be related to this patch. Re-running them on my local machine does succeed.
          Hide
          hadoopqa Hadoop QA added a comment -



          -1 overall



          Vote Subsystem Runtime Comment
          -1 pre-patch 19m 50s Findbugs (version ) appears to be broken on trunk.
          +1 @author 0m 0s The patch does not contain any @author tags.
          +1 tests included 0m 0s The patch appears to include 2 new or modified test files.
          +1 javac 7m 37s There were no new javac warning messages.
          +1 javadoc 9m 41s There were no new javadoc warning messages.
          +1 release audit 0m 22s The applied patch does not increase the total number of release audit warnings.
          +1 site 2m 57s Site still builds.
          +1 checkstyle 1m 38s There were no new checkstyle issues.
          +1 whitespace 0m 0s The patch has no lines that end in whitespace.
          +1 install 1m 31s mvn install still works.
          +1 eclipse:eclipse 0m 32s The patch built with eclipse:eclipse.
          +1 findbugs 4m 21s The patch does not introduce any new Findbugs (version 3.0.0) warnings.
          -1 common tests 22m 21s Tests failed in hadoop-common.
          -1 hdfs tests 176m 4s Tests failed in hadoop-hdfs.
              246m 58s  



          Reason Tests
          Failed unit tests hadoop.ha.TestZKFailoverController
            hadoop.net.TestNetUtils
            hadoop.hdfs.TestRollingUpgrade
          Timed out tests org.apache.hadoop.cli.TestHDFSCLI



          Subsystem Report/Notes
          Patch URL http://issues.apache.org/jira/secure/attachment/12749711/HDFS-8883.001.patch
          Optional Tests site javadoc javac unit findbugs checkstyle
          git revision trunk / 1c12adb
          hadoop-common test log https://builds.apache.org/job/PreCommit-HDFS-Build/11982/artifact/patchprocess/testrun_hadoop-common.txt
          hadoop-hdfs test log https://builds.apache.org/job/PreCommit-HDFS-Build/11982/artifact/patchprocess/testrun_hadoop-hdfs.txt
          Test Results https://builds.apache.org/job/PreCommit-HDFS-Build/11982/testReport/
          Java 1.7.0_55
          uname Linux asf909.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
          Console output https://builds.apache.org/job/PreCommit-HDFS-Build/11982/console

          This message was automatically generated.

          Show
          hadoopqa Hadoop QA added a comment - -1 overall Vote Subsystem Runtime Comment -1 pre-patch 19m 50s Findbugs (version ) appears to be broken on trunk. +1 @author 0m 0s The patch does not contain any @author tags. +1 tests included 0m 0s The patch appears to include 2 new or modified test files. +1 javac 7m 37s There were no new javac warning messages. +1 javadoc 9m 41s There were no new javadoc warning messages. +1 release audit 0m 22s The applied patch does not increase the total number of release audit warnings. +1 site 2m 57s Site still builds. +1 checkstyle 1m 38s There were no new checkstyle issues. +1 whitespace 0m 0s The patch has no lines that end in whitespace. +1 install 1m 31s mvn install still works. +1 eclipse:eclipse 0m 32s The patch built with eclipse:eclipse. +1 findbugs 4m 21s The patch does not introduce any new Findbugs (version 3.0.0) warnings. -1 common tests 22m 21s Tests failed in hadoop-common. -1 hdfs tests 176m 4s Tests failed in hadoop-hdfs.     246m 58s   Reason Tests Failed unit tests hadoop.ha.TestZKFailoverController   hadoop.net.TestNetUtils   hadoop.hdfs.TestRollingUpgrade Timed out tests org.apache.hadoop.cli.TestHDFSCLI Subsystem Report/Notes Patch URL http://issues.apache.org/jira/secure/attachment/12749711/HDFS-8883.001.patch Optional Tests site javadoc javac unit findbugs checkstyle git revision trunk / 1c12adb hadoop-common test log https://builds.apache.org/job/PreCommit-HDFS-Build/11982/artifact/patchprocess/testrun_hadoop-common.txt hadoop-hdfs test log https://builds.apache.org/job/PreCommit-HDFS-Build/11982/artifact/patchprocess/testrun_hadoop-hdfs.txt Test Results https://builds.apache.org/job/PreCommit-HDFS-Build/11982/testReport/ Java 1.7.0_55 uname Linux asf909.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Console output https://builds.apache.org/job/PreCommit-HDFS-Build/11982/console This message was automatically generated.
          Hide
          anu Anu Engineer added a comment -
          • Adds a metric that exposes the FSNameSystemLock Contention
          • Added tests to verify that lock contention will produce right metric
          • Added tests to verify that JMX exposes these counters
          Show
          anu Anu Engineer added a comment - Adds a metric that exposes the FSNameSystemLock Contention Added tests to verify that lock contention will produce right metric Added tests to verify that JMX exposes these counters

            People

            • Assignee:
              anu Anu Engineer
              Reporter:
              anu Anu Engineer
            • Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved:

                Development