[YARN-163] Retrieving container log via NM webapp can hang with multibyte characters in log

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.3, 2.0.0-alpha
• Fix Version/s: 2.0.3-alpha, 0.23.5
• Component/s: nodemanager
• Assignee: Jason Darrell Lowe
• Reporter: Jason Darrell Lowe
• Created: 17/Oct/12 00:49
• Updated: 03/Sep/14 23:17
• Resolved: 19/Oct/12 17:41

Description

ContainerLogsBlock.printLogs currently assumes that skipping N bytes in the log file is the same as skipping N characters, but that is not true when the log contains multibyte characters. This can cause the loop that skips a portion of the log to try to skip past the end of the file and loop forever (or until Jetty kills the worker thread).