[HADOOP-911] Multithreading issue with libhdfs library

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.9.2
• Fix Version/s: 0.14.0
• Assignee: Christian Kunz
• Reporter: Christian Kunz
• Created: 19/Jan/07 22:47
• Updated: 08/Jul/09 17:05
• Resolved: 11/Jul/07 20:39

Description

Multithreaded applications using libhdfs sometimes run into IllegalMonitorStateException or plainly lock up (strace shows a thread being in a loop of calling sched_yield). It probably has to do with the fact that libhdfs does not ensure proper allocation of hashtable entries that map a threadId to JNI interface pointer.