准备过节了，对系统做了一次全面的检查，也发现了不少的问题，对某一台RAC检查时发现如下错误：
2015-08-23 04:34:18.962:
[client(18715)]CRS-0009:log file "/oracle/app/11.2.0/grid/log/d4jt6csvpra04/client/olsnodes.log" reopened
2015-08-23 04:34:18.962:
[client(18715)]CRS-0019:file rotation terminated. log file: "/oracle/app/11.2.0/grid/log/d4jt6csvpra04/client/olsnodes.log"
2015-08-23 04:39:19.095:
[client(19507)]CRS-0014:An error occurred while attempting to delete file "/oracle/app/11.2.0/grid/log/d4jt6csvpra04/client/olsnodes.l03" during log file rotation. Additional diagnostics: LFI-00142: Unable to delete an existing file [olsnodes][l03] not owned by Oracle.

从日志来看，应该是日志的轮循出现了错误，根据提示无法删除属于oracle的日志文件，检查日志发现：部分日志非常的大：
total 4.5G
-rw-r--r-- 1 grid oinstall    0 Dec  7  2013 orarootagent_rootOUT.log
-rw-r--r-- 1 grid oinstall  11M Dec 10  2013 orarootagent_root.l10
-rw-r--r-- 1 grid oinstall    5 Jan 16  2015 orarootagent_root.pid
-rw-r--r-- 1 grid oinstall 4.5G Sep 29 11:58 orarootagent_root.log
[grid@d4jt6csvpra04 orarootagent_root]$

发现类似于这样的大日志情况还是蛮多的，在MOS上看了下，与bug有关，检查自己的环境是11.2.0.4.0并且没有打上任何补丁，MOS建议如下：

It is caused by unpublished Bug 18700935 - CLOUD:ACLDX0085 OCSSD LOG IS NOT ROTATED

At some point in time, the Clusterware alert log reports an attempted logfile rotation failure.

As a result, the last logfile 'ocssd.110' is never deleted. This may be due to the logfile being open during logfile delete or a permissions issue on the file itself.

The ocssd.bin thread that performs log file rotation 'clsd_logThread' encounters the delete failure and this causes the logfile never to be deleted/rotated, resulting in ocssd.log continually growing in size.

Extract of the error in $GRID_HOME/log/<hostname>/alert<hostname>.log

SOLUTION

The CSSD thread that encountered the LFI-00142 error needs to be restarted to ensure log rotation works again.

Manually deleting the logfile will not resolve the log rotation problem.

1).  Shutdown CRS on the node reporting the problem.

# crsctl stop crs

2).  Once CRS is down,  proceed to manually delete the 'ocssd.l10' file, or copy the logfile to another location if you need to keep a backup.

# rm  $GRID_HOME/log/<hostname>/cssd/ocssd.l10

3).  Startup Clusterware again

# crsctl start crs

4). Bug 18700935 has been fixed in 11.2.0.4.5 PSU for Unix/Linux platform and 11.2.0.4.12 Bundle for Windows platform. Please apply the patch if required

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