[Bug 691414] Re: clamav taking extremely long time to load database

[Scott Kitterman]

Maverick has the same clamav as lucid-updates, so it will affect that
too.

** Description changed:

  Binary package hint: clamav
  
  # apt-cache policy clamav-daemon
  clamav-daemon:
    Installed: 0.96.3+dfsg-2ubuntu1.0.10.04.2
    Candidate: 0.96.3+dfsg-2ubuntu1.0.10.04.2
  
  Since the security update of clamav, the daemon takes multiple minutes
  to load its virus database, and is causing random timeouts for users of
  the unix socket (in my case, mimedefang), triggering repeated 400-series
  email temp-fails each time freshclam issues a reload request.
  
  strace just shows it slowly allocating memory and not doing much else.
  
  Logs don't seem to help:
  Thu Dec 16 20:58:34 2010 -> +++ Started at Thu Dec 16 20:58:34 2010
  Thu Dec 16 20:58:34 2010 -> clamd daemon 0.96.3 (OS: linux-gnu, ARCH: x86_64, CPU: x86_64)
  Thu Dec 16 20:58:34 2010 -> Log file size limit disabled.
  Thu Dec 16 20:58:34 2010 -> Reading databases from /var/lib/clamav/
  Thu Dec 16 20:58:34 2010 -> Not loading PUA signatures.
  Thu Dec 16 20:58:38 2010 -> Loaded 856324 signatures.
  
  But minutes later, it's still spinning at 100% CPU and non-responsive on
  its socket.
  
  Here's the backtrace while its stuck:
  
  (gdb) bt
  #0  __find<__gnu_cxx::__normal_iterator<llvm::BasicBlock* const*, std::vector<llvm::BasicBlock*, std::allocator<llvm::BasicBlock*> > >, llvm::BasicBlock const*> (this=0x1a9f300, L=0x1466740, ExitingBlock=<value optimized out>) at /usr/include/c++/4.4/bits/stl_algo.h:186
  #1  find<__gnu_cxx::__normal_iterator<llvm::BasicBlock* const*, std::vector<llvm::BasicBlock*, std::allocator<llvm::BasicBlock*> > >, llvm::BasicBlock const*> (this=0x1a9f300, L=0x1466740, ExitingBlock=<value optimized out>) at /usr/include/c++/4.4/bits/stl_algo.h:4224
  #2  llvm::LoopBase<llvm::BasicBlock, llvm::Loop>::contains (this=0x1a9f300, L=0x1466740, ExitingBlock=<value optimized out>)
      at ./llvm/include/llvm/Analysis/LoopInfo.h:108
  #3  llvm::ScalarEvolution::ComputeBackedgeTakenCountFromExit (this=0x1a9f300, L=0x1466740, ExitingBlock=<value optimized out>)
      at llvm/lib/Analysis/ScalarEvolution.cpp:3612
  #4  0x00007f6591bad79f in llvm::ScalarEvolution::ComputeBackedgeTakenCount (this=0x1a9f300, L=0x1466740)
      at llvm/lib/Analysis/ScalarEvolution.cpp:3542
  #5  0x00007f6591badaa5 in llvm::ScalarEvolution::getBackedgeTakenInfo (this=0x1a9f300, L=0x1466740) at llvm/lib/Analysis/ScalarEvolution.cpp:3415
  #6  0x00007f6591badfa9 in llvm::ScalarEvolution::getMaxBackedgeTakenCount (this=0x299a6e0, L=0x7) at llvm/lib/Analysis/ScalarEvolution.cpp:3390
  #7  0x00007f6591966040 in loopNeedsTimeoutCheck (this=<value optimized out>, F=<value optimized out>) at bytecode2llvm.cpp:363
  #8  runOnFunction (this=<value optimized out>, F=<value optimized out>) at bytecode2llvm.cpp:435
  #9  0x00007f6591ab8166 in llvm::FPPassManager::runOnFunction (this=0x11a6ae0, F=...) at llvm/lib/VMCore/PassManager.cpp:1350
  #10 0x00007f6591ab827b in llvm::FPPassManager::runOnModule (this=0x11a6ae0, M=...) at llvm/lib/VMCore/PassManager.cpp:1371
  #11 0x00007f6591ab7d0b in llvm::MPPassManager::runOnModule (this=0x11cdab0, M=...) at llvm/lib/VMCore/PassManager.cpp:1424
  #12 0x00007f6591ab7e99 in llvm::PassManagerImpl::run (this=0x11a1dc0, M=...) at llvm/lib/VMCore/PassManager.cpp:1506
  #13 0x00007f659196dcff in generate (this=0x7fffe4746540) at bytecode2llvm.cpp:1411
  #14 0x00007f659196f85b in cli_bytecode_prepare_jit (bcs=<value optimized out>) at bytecode2llvm.cpp:1826
  #15 0x00007f659194bec1 in cli_bytecode_prepare2 (engine=0x10fdb60, bcs=0x10fdc50, dconfmask=7) at bytecode.c:2353
  #16 0x00007f65918d0310 in cl_engine_compile (engine=0x10fdb60) at readdb.c:3112
  #17 0x0000000000407cfc in main (argc=<value optimized out>, argv=<value optimized out>) at clamd.c:495
+ 
+ TEST CASE: Install new packages and observe improved startup times.
+ Since this update is a micro-version update and not a targeted patch for
+ just the problem, when testing be alert for other issues/regressions.

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https://bugs.launchpad.net/bugs/691414

Title:
  clamav taking extremely long time to load database