Bharath Vissapragada has uploaded this change for review. ( http://gerrit.cloudera.org:8080/10998
Change subject: IMPALA-6857: Add Jvm pause/GC Monitor utility ...................................................................... IMPALA-6857: Add Jvm pause/GC Monitor utility This commit adds a stripped down version of Hadoop's JvmPauseMonitor class (https://bit.ly/2O6qSwm) . The core implementaion is borrowed from hadoop-common project and the hadoop dependencies are removed. - Removed dependency on AbstractService. - Not relying on Hadoop's Configuration object for reading confs. - Switched to Guava's implementation of Stopwatch. This utility class can detect both GC/non-GC pauses. In case of GC pauses, the difference of GC metrics before and after pause are logged. Sample Output: ============= Detected pause in JVM or host machine (eg GC): pause of approximately 2356ms GC pool 'PS MarkSweep' had collection(s): count=1 time=2241ms GC pool 'PS Scavenge' had collection(s): count=3 time=352ms Detected pause in JVM or host machine (eg GC): pause of approximately 1964ms GC pool 'PS MarkSweep' had collection(s): count=1 time=2082ms GC pool 'PS Scavenge' had collection(s): count=1 time=251ms Detected pause in JVM or host machine (eg GC): pause of approximately 2120ms GC pool 'PS MarkSweep' had collection(s): count=1 time=2454ms Detected pause in JVM or host machine (eg GC): pause of approximately 2238ms GC pool 'PS MarkSweep' had collection(s): count=5 time=13464ms ^CDetected pause in JVM or host machine (eg GC): pause of approximately 2233ms GC pool 'PS MarkSweep' had collection(s): count=1 time=2733ms Testing: ======= - Tested it manually with kill -SIGSTOP/-SIGCONT <pid>. Made sure that the non-GC JVM pauses are logged. - This class' functionality is tested manually by invoking it's main() - Injected a memory leak into the Catalog server code and made sure the GC is detected. Change-Id: I30d897b7e063846ad6d8f88243e2c04264da0341 --- M be/src/common/init.cc M be/src/util/jni-util.cc M be/src/util/jni-util.h M fe/src/main/java/org/apache/impala/common/JniUtil.java A fe/src/main/java/org/apache/impala/util/JvmPauseMonitor.java 5 files changed, 228 insertions(+), 0 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/98/10998/2 -- To view, visit http://gerrit.cloudera.org:8080/10998 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: I30d897b7e063846ad6d8f88243e2c04264da0341 Gerrit-Change-Number: 10998 Gerrit-PatchSet: 2 Gerrit-Owner: Bharath Vissapragada <bhara...@cloudera.com>
