resource busy (file is locked) with multi-threaded file ops
|Reported by:||StefanWehr||Owned by:||simonmar|
|Type of failure:||Incorrect result at runtime||Test Case:|
|Related Tickets:||Differential Rev(s):|
The sample program attached creates 10 worker threads, each of which takes a different file name. Each worker thread then writes the file, reads the file, writes the file and so on. File operations use *strict IO*.
When compiled without -threaded everything is ok, that is, the program goes on forever without any error messages.
But with -threaded, the program quickly fails with ERROR in worker 4: 4: openBinaryFile: resource busy (file is locked).
Tested under Mac OSX 10.8.2 and Linux. Tested with both GHC 7.6.1 and 7.6.2.
I could reproduce the bug without +RTS -N -RTS and with this RTS option. A colleague of mine reports that it needs +RTS -N2 -RTS to reproduce the bug.
Change History (8)
Changed 3 years ago by StefanWehr
comment:4 Changed 3 years ago by simonmar
- Component changed from Runtime System to libraries/base
- difficulty set to Unknown
- Milestone set to 7.6.3
- Owner set to simonmar
- Priority changed from normal to high