[
https://issues.apache.org/jira/browse/KUDU-3404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Joe McDonnell updated KUDU-3404:
--------------------------------
Attachment: 0001-Add-WITH_TLS-OFF-to-glog-build-definition.patch
> glog 0.6.0 increases the TLS usage of libkudu_client.so substantially
> ---------------------------------------------------------------------
>
> Key: KUDU-3404
> URL: https://issues.apache.org/jira/browse/KUDU-3404
> Project: Kudu
> Issue Type: Bug
> Components: client
> Affects Versions: 1.17.0
> Reporter: Joe McDonnell
> Priority: Critical
> Attachments: 0001-Add-WITH_TLS-OFF-to-glog-build-definition.patch
>
>
> Glog 0.4 introduced supported for using thread local storage for its buffer.
> This feature is controlled by the WITH_TLS CMake variable, and it defaults to
> ON. See
> [https://github.com/google/glog/commit/2df0ca34aa3000dadf76633ca700abf0bf50756d]
> . When Kudu upgraded to glog 0.6.0 as part of the M1 fixes in "[KUDU-3374
> Add support for M1 and macOS
> Monterey|https://github.com/apache/kudu/commit/543e128d473f8f7836e605bba8cd6512fa918550]";,
> it increased the thread local storage usage by >30000 bytes.
> {noformat}
> # Older libkudu_client.so has 0x100 = 256 bytes of TLS:
> $ readelf -l libkudu_client.so | grep "TLS" -A1
> TLS 0x00000000007d14c0 0x00000000007d24c0 0x00000000007d24c0
> 0x0000000000000080 0x0000000000000100 R 0x40
> # Newer libkudu_client.so has 0x77b9 = 30649 bytes of TLS:
> $ readelf -l libkudu_client.so.0 | grep TLS -A1
> TLS 0x0000000000751280 0x0000000000752280 0x0000000000752280
> 0x0000000000000080 0x00000000000077b9 R 40{noformat}
> This is a problem for Impala, because Impala starts a JVM. There are certain
> JVM threads (like the "reaper thread") that have very small stacks (e.g.
> 32KB) and with glibc the TLS space is allocated at the expense of stack
> space. 30k of TLS usage leaves very little for the reaper thread. There are a
> series of bugs where the Java reaper thread hits a StackOverflowException
> because of high TLS usage. This can cause various symptoms including hangs.
> GLIBC message thread: [https://sourceware.org/bugzilla/show_bug.cgi?id=11787]
> JDK bugs:
> [JDK-8217475|https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8217475],
> [JDK-8225035|https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8225035]
> To resolve Impala's problem, it would be useful to build libkudu_client.so
> with glog's WITH_TLS=OFF.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
