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Posted to issues@ozone.apache.org by GitBox <gi...@apache.org> on 2020/07/10 04:52:05 UTC
[GitHub] [hadoop-ozone] runzhiwang opened a new pull request #1186: HDDS-3941. Enable core dump when crash in C++
runzhiwang opened a new pull request #1186:
URL: https://github.com/apache/hadoop-ozone/pull/1186
## What changes were proposed in this pull request?
**What's the problem ?**
This PR is related to HDDS-3933. Fix memory leak because of too many Datanode State Machine Thread.
When memory leak, Datanode most time generates core.pid because it crash in Rocksdb when create new thread, as the image shows, and generates crash log rarely.
But because the default value of `core file size` if zero, so core.pid can not be generated. So when Datanode crash in Rocksdb, we can not get any information about why it crashed.
**How to fix ?**
Set `ulimit -c unlimited` to enable core dump when crash in RocksDB.
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-3941
## How was this patch tested?
Existed UT.
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[GitHub] [hadoop-ozone] ChenSammi commented on pull request #1186: HDDS-3941. Enable core dump when crash in C++
Posted by GitBox <gi...@apache.org>.
ChenSammi commented on pull request #1186:
URL: https://github.com/apache/hadoop-ozone/pull/1186#issuecomment-657388589
The patch looks good to me. + 1.
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[GitHub] [hadoop-ozone] ChenSammi merged pull request #1186: HDDS-3941. Enable core dump when crash in C++
Posted by GitBox <gi...@apache.org>.
ChenSammi merged pull request #1186:
URL: https://github.com/apache/hadoop-ozone/pull/1186
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