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  1. Kudu
  2. KUDU-2395

Thread spike with all threads blocked in libnss

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Details

    • Bug
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • None
    • NA
    • consensus, tserver, util
    • None

    Description

      I saw the thread count on a server under a load test spike from 280 threads (fairly constant) to 3400 threads (briefly). I checked the diagnostics log and found that there are several thousand threads in a stack like:

      0x7facce018606 _nss_files_gethostbyname2_r
        0x345a703645 <unknown>
        0x345a6d0b3b <unknown>
        0x345a6d2d80 <unknown>
           0x1c9366c kudu::(anonymous namespace)::GetAddrInfo()
           0x1c95fbe kudu::HostPort::ResolveAddresses()
            0xac4b78 kudu::consensus::(anonymous namespace)::CreateConsensusServiceProxyForHost()
            0xac5058 kudu::consensus::RpcPeerProxyFactory::NewProxy()
            0xb0b212 kudu::consensus::LeaderElection::LeaderElection()
            0xafab80 kudu::consensus::RaftConsensus::StartElection()
            0xafd20c kudu::consensus::RaftConsensus::ReportFailureDetectedTask()
           0x1ccf4ed kudu::FunctionRunnable::Run()
      

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              Unassigned Unassigned
              tlipcon Todd Lipcon
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                Updated:
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