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  1. Cassandra
  2. CASSANDRA-13211

Use portable stderr for java error in startup

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    • Severity:
      Normal

      Description

      The cassandra startup shell script contains this line:

      echo Unable to find java executable. Check JAVA_HOME and PATH environment variables. > /dev/stderr

      The problem here is the construct "> /dev/stderr". If the user invoking Cassandra has changed user (for example, by SSHing in as a personal user, and then sudo-ing to an application user responsible for executing the Cassandra daemon), then the attempt to open /dev/stderr will fail, because it will point to a PTY node under /dev/pts/ owned by the original user.

      Ultimately this leads to the real problem being masked by the confusing error message "bash: /dev/stderr: Permission denied".

      The correct technique is to replace "> /dev/stderr" with ">&2" which will write to the already open stderr file descriptor, instead of resolving the chain of symlinks starting at /dev/stderr, and attempting to reopen the target by name.

        Attachments

        1. 13211_use-portable-stderr.patch
          1 kB
          Michael Shuler

          Activity

            People

            • Assignee:
              mshuler Michael Shuler
              Reporter:
              maxb Max Oliver Bowsher
              Authors:
              Michael Shuler
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              Dates

              • Created:
                Updated:
                Resolved: