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Daryn Sharp commented on HDFS-4178: ----------------------------------- +1 Although it's worth noting that I don't think data corruption will occur, just a EBADF (Bad file descriptor) error if anything attempts to write to stderr. I'll let there be a second opinion on this one. > shell scripts should not close stderr > ------------------------------------- > > Key: HDFS-4178 > URL: https://issues.apache.org/jira/browse/HDFS-4178 > Project: Hadoop HDFS > Issue Type: Bug > Components: scripts > Affects Versions: 2.0.2-alpha > Reporter: Andy Isaacson > Assignee: Andy Isaacson > Attachments: hdfs4178.txt > > > The {{start-dfs.sh}} and {{stop-dfs.sh}} scripts close stderr for some > subprocesses using the construct > bq. {{2>&-}} > This is dangerous because child processes started up under this scenario will > re-use filedescriptor 2 for opened files. Since libc and many other > codepaths assume that filedescriptor 2 can be written to in error conditions, > this can potentially result in data corruption. > Much better to redirect stderr using the construct {{2>/dev/null}}. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira