Repository: kudu Updated Branches: refs/heads/master b8cf59a2f -> 8478f026e
[docs] Add docs for 'Could not create thread' error Change-Id: I1e24dc98a0f51a0af2d4959043ae80d44ba1ba0a Reviewed-on: http://gerrit.cloudera.org:8080/10078 Reviewed-by: Adar Dembo <a...@cloudera.com> Tested-by: Will Berkeley <wdberke...@gmail.com> Reviewed-by: Todd Lipcon <t...@apache.org> Project: http://git-wip-us.apache.org/repos/asf/kudu/repo Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/a9bc168f Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/a9bc168f Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/a9bc168f Branch: refs/heads/master Commit: a9bc168f81f7fbd628569e1d0b5e0124399882f7 Parents: b8cf59a Author: Will Berkeley <wdberke...@apache.org> Authored: Mon Apr 16 13:51:26 2018 -0400 Committer: Will Berkeley <wdberke...@gmail.com> Committed: Mon Apr 16 23:12:25 2018 +0000 ---------------------------------------------------------------------- docs/troubleshooting.adoc | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/kudu/blob/a9bc168f/docs/troubleshooting.adoc ---------------------------------------------------------------------- diff --git a/docs/troubleshooting.adoc b/docs/troubleshooting.adoc index 71b3771..51d412c 100644 --- a/docs/troubleshooting.adoc +++ b/docs/troubleshooting.adoc @@ -575,3 +575,20 @@ Users will encounter this exception when trying to use a Kudu table via Hive. Th is not a case of a missing jar, but simply that Impala stores Kudu metadata in Hive in a format that's unreadable to other tools, including Hive itself and Spark. There is no workaround for Hive users. Spark users need to create temporary tables. + +[[too_many_threads]] +=== Runtime error: Could not create thread: Resource temporarily unavailable (error 11) + +Users will encounter this error when Kudu is unable to create more threads, +usually on versions of Kudu older than 1.7. It happens on tablet servers, and +is a sign that the tablet server hosts too many tablet replicas. To fix the +issue, users can raise the `nproc` ulimit as detailed in the documentation for +their operating system or distribution. However, the better solution is to +reduce the number of replicas on the tablet server. This may involve rethinking +the table's partitioning schema. For the recommended limits on number of +replicas per tablet server, see the known issues and scaling limitations +documentation for the appropriate Kudu release. The +link:http://kudu.apache.org/releases/[releases page] has links to documentation +for previous versions of Kudu; for the latest release, see the +link:known_issues.html[known issues page]. +
