Thomas Tauber-Marshall has uploaded a new patch set (#2). Change subject: IMPALA-4566: Kudu client glog contention can cause timeouts ......................................................................
IMPALA-4566: Kudu client glog contention can cause timeouts Under stressful workloads, there appears to be significant contention in glog resulting from Kudu logging, causing timeouts and failed queries. An easy solution for now is to downgrade Kudu WARNINGs to INFOs as WARNINGs grab a lock to flush the log. This is appropriate as Kudu logs WARNINGs much more frequently than Impala and for things that Impala would normally consider INFO-level. Testing: Manually verified that the patch redirects Kudu WARNINGs to the INFO log. Not tested under stress to verify if this actually solves the contention problem. Change-Id: Ie535d89ec2525232d4f6a29dd44f51cd6e18a0d2 --- M be/src/exec/kudu-util.cc 1 file changed, 4 insertions(+), 2 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/34/5334/2 -- To view, visit http://gerrit.cloudera.org:8080/5334 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: newpatchset Gerrit-Change-Id: Ie535d89ec2525232d4f6a29dd44f51cd6e18a0d2 Gerrit-PatchSet: 2 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Thomas Tauber-Marshall <tmarsh...@cloudera.com> Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com> Gerrit-Reviewer: Matthew Jacobs <m...@cloudera.com>
