Hey,
In Hadoop-0.19.0, we've been getting crashing, deadlocking, and other
badness from libhdfs (I think: I'm using it through fuse-dfs).
https://issues.apache.org/jira/browse/HADOOP-4775
However, I've been at a complete loss to make any progress in
debugging. The problem happens consistently in our workflows, even
though it's been problematic to find a simple test case (I suspect the
issues are triggered by threading, while debug mode eliminates any
threading!). It doesn't appear there are any nice ways to debug or
follow along with actions in fuse_dfs or libhdfs: I don't even know
how to make DFSClient spill its guts to a log.
Help!
Brian
