[jira] [Created] (KUDU-2005) Non-actionable error message if pointing --webserver_{certificate,private_key}_file to non-existing files

["Alexey Serbin (JIRA)" <ji...@apache.org>]

Alexey Serbin created KUDU-2005:
-----------------------------------

             Summary: Non-actionable error message if pointing --webserver_{certificate,private_key}_file to non-existing files
                 Key: KUDU-2005
                 URL: https://issues.apache.org/jira/browse/KUDU-2005
             Project: Kudu
          Issue Type: Bug
          Components: master, tserver
    Affects Versions: 1.3.1
            Reporter: Alexey Serbin
            Assignee: Alexey Serbin


If pointing to non-existent files using {{--webserver_certificate_file}} and {{--webserver_private_key_file}} flags, kudu-master and kudu-tserver fail to start with obscure error message like the following:

{noformat}
F0510 10:33:30.088955 27653 master_main.cc:71] Check failed: _s.ok() Bad status: Network error: Webserver: Could not start on address 0.0.0.0:8051
{noformat}

Nothing else is in the WARNING or ERROR log files indicate that the issue was about not being able to load the data from the specified files.

The only trace of the real cause of the issue can be found in the INFO log file:

{noformat}
I0510 10:33:30.046664 27653 webserver.cc:148] Webserver: Enabling HTTPS support
I0510 10:33:30.046880 27653 webserver.cc:297] Webserver: set_ssl_option: cannot open /etc/tls/kudu-master.cert.pem: error:02001002:system library:fopen:No such file or directory
W0510 10:33:30.046972 27653 net_util.cc:293] Failed to bind to 0.0.0.0:8051. Trying to use lsof to find any processes listening on the same port:
I0510 10:33:30.047003 27653 net_util.cc:296] $ export PATH=$PATH:/usr/sbin ; lsof -n -i 'TCP:8051' -sTCP:LISTEN ; for pid in $(lsof -F p -n -i 'TCP:8051' -sTCP:LISTEN | grep p | cut -f 2 -dp) ; do  while [ $pid -gt 1 ] ; do    ps h -fp $pid ;    stat=($(</proc/$pid/stat)) ;    pid=${stat[3]} ;  done ; done
W0510 10:33:30.088867 27653 net_util.cc:303] 
{noformat}

It's necessary to make the error message informative and actionable.



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