Issue

• When standard output of telnet command is sent to tee command via pipe and many output occurs, tee command hangs with the message 'tee: standard output: Resource temporarily unavailable' outputted. This issue occurred at our customer's site.

• How reproducible: It always occurs if many messages are outputted.

• Steps to Reproduce:

  1. Run the following command and login.

     # telnet localhost | tee /tmp/tee.log
     

  2. Output a very large file with cat command.

     # cat /var/log/messages
     

• Actual results: tee command hangs after 'tee: standard output: Resource temporarily unavailable' is outputted.

• Expected results: It works without errors.

• Additional information:

  • If ssh instead of telnet is specified then it does not occur.
  • It occurred in RHEL6, too.