#7646: resource busy (file is locked) with multi-threaded file ops ----------------------------------------+----------------------------------- Reporter: StefanWehr | Owner: Type: bug | Status: new Priority: normal | Component: Runtime System Version: 7.6.1 | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: Incorrect result at runtime | Blockedby: Blocking: | Related: ----------------------------------------+----------------------------------- 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. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7646 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler