Likkey opened a new pull request, #5568: URL: https://github.com/apache/hadoop/pull/5568
### Description of PR When the configuration item “dfs.client.mmap.cache.size” is set to a negative number, it will cause /hadoop/bin hdfs dfsadmin -safemode provides all the operation options including enter, leave, get, wait and forceExit are invalid, the terminal returns security mode is null and no exceptions are thrown. [[[HDFS-16653](https://issues.apache.org/jira/browse/HDFS-16653)](https://issues.apache.org/jira/browse/HDFS-16653)](https://issues.apache.org/jira/browse/HDFS-16653) ### How was this patch tested? This patch adds maxEvictableMmapedSize that is "dfs.client.mmap.cache.size" related Precondition check suite error message, and give a clear indication when the configuration is abnormal in order to solve the problem in time and reduce the impact on the safe mode related operations. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
