Shyamal Prasad created ZOOKEEPER-1983:
-----------------------------------------
Summary: Append to zookeeper.out (not overwrite) to support
logrotation
Key: ZOOKEEPER-1983
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1983
Project: ZooKeeper
Issue Type: Bug
Components: server
Affects Versions: 3.3.5
Environment: CentOS 5.x (and probably any Linux distribution for that
matter)
Reporter: Shyamal Prasad
Currently zkServer.sh will redirect output to zookeeper.out using a simple
shell redirect.
When logrotate (and similar tools) are used to rotate the zookeeper.out file
with the 'copytruncate' semantics (copy the file, truncate it to zero bytes)
the next write results in a sparse file with the write at the offset of the
last file. Effectively the log file is now full a null bytes and it is hard to
read/use the file (and the rotated copies).
Even worse, the result is zookeeper.out file only gets "larger" (though sparse)
and after a while on a chatty system it takes significant CPU resources to
compress the file (which is all nulls!)
The simple fix is to append to the file (>>) instead of a simple redirection (>)
--
This message was sent by Atlassian JIRA
(v6.2#6252)
