investigate flaky tests on fedora 24

not ok 2001 sequential/test-child-process-pass-fd
  ---
  duration_ms: 2.823
  severity: fail
  stack: |-
    node[26803]: pthread_create: Resource temporarily unavailable
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
        at process.target.send (internal/child_process.js:606:16)
        at Socket.socketConnected (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-child-process-pass-fd.js:37:15)
        at Object.onceWrapper (events.js:218:13)
        at Socket.emit (events.js:126:13)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:10)
...
not ok 2046 sequential/test-inspector-port-cluster
  ---
  duration_ms: 0.661
  severity: fail
  stack: |-
    Debugger listening on ws://127.0.0.1:12346/5b474053-46e9-47a3-a22d-12fdf214dcdc
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://127.0.0.1:9229/01dcd483-2268-4194-86dd-fd6da35c083d
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://127.0.0.1:12356/088df66b-35aa-48df-95cf-9ceb550b522d
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://127.0.0.1:12351/1a086704-73e0-43db-87a7-fee4cf2518ef
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://127.0.0.1:12366/ac22826d-1f0c-47ca-a745-d52362749d52
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://0.0.0.0:12361/86a78680-52b3-4a47-9250-529eaa308a6b
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://[::1]:12376/744a25a8-b1ad-4351-948b-38d5cd959926
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://127.0.0.1:12386/56a7d647-bcd1-4b7d-87e9-0c6374a26fe1
    For help see https://nodejs.org/en/docs/inspector
    Debugger listening on ws://127.0.0.1:12381/5083d73a-b46c-4b2e-8c67-58c86f51fdb9
    For help see https://nodejs.org/en/docs/inspector
    node[27553]: pthread_create: Resource temporarily unavailable
    /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node[27553]: ../src/inspector_io.cc:207:bool node::inspector::InspectorIo::Start(): Assertion `(uv_thread_create(&thread_, InspectorIo::ThreadMain, this)) == (0)' failed.
     1: node::Abort() [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     2: 0x1234545 [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     3: 0x12db98a [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     4: Debugger listening on ws://127.0.0.1:12391/339d35cf-af3c-4332-85cf-23c05b2cc96d
    For help see https://nodejs.org/en/docs/inspector
    node::inspector::Agent::Start(node::NodePlatform*, char const*, node::DebugOptions const&) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     5: node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     6: node::Start(int, char**) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     7: __libc_start_main [/lib64/libc.so.6]
     8: _start [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
    node[27543]: pthread_create: Resource temporarily unavailable
    /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node[27543]: ../src/inspector_io.cc:207:bool node::inspector::InspectorIo::Start(): Assertion `(uv_thread_create(&thread_, InspectorIo::ThreadMain, this)) == (0)' failed.
     1: node::Abort() [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     2: 0x1234545 [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     3: 0x12db98a [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     4: node::inspector::Agent::Start(node::NodePlatform*, char const*, node::DebugOptions const&) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     5: node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     6: node::Start(int, char**) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     7: __libc_start_main [/lib64/libc.so.6]
     8: _start [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
    Debugger listening on ws://[::]:12371/a06cbab2-38e2-49d7-a1e0-752d437970b8
    For help see https://nodejs.org/en/docs/inspector
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    Debugger listening on ws://127.0.0.1:12406/4db10d1c-17a0-4134-a981-a2aa98f7e9ff
    For help see https://nodejs.org/en/docs/inspector
    node[27562]: pthread_create: Resource temporarily unavailable
    /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node[27562]: ../src/inspector_io.cc:207:bool node::inspector::InspectorIo::Start(): Assertion `(uv_thread_create(&thread_, InspectorIo::ThreadMain, this)) == (0)' failed.
     1: node::Abort() [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     2: 0x1234545 [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     3: 0x12db98a [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     4: events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    node::inspector::Agent::Start(node::NodePlatform*, char const*, node::DebugOptions const&) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     5: node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     6: node::Start(int, char**) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     7: __libc_start_main [/lib64/libc.so.6]
     8: _start [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    Debugger listening on ws://127.0.0.1:12396/2adf877b-8a1a-4558-acaa-9511aae1b852
    For help see https://nodejs.org/en/docs/inspector
    events.js:111
          throw er; // Unhandled 'error' event
          ^
    
    Error: spawn /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node EAGAIN
        at _errnoException (util.js:1013:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
        at onErrorNT (internal/child_process.js:389:16)
        at process._tickCallback (internal/process/next_tick.js:152:19)
        at Function.Module.runMain (module.js:703:11)
        at startup (bootstrap_node.js:195:16)
        at bootstrap_node.js:646:3
    node[27597]: pthread_create: Resource temporarily unavailable
    /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node[27597]: ../src/inspector_io.cc:207:bool node::inspector::InspectorIo::Start(): Assertion `(uv_thread_create(&thread_, InspectorIo::ThreadMain, this)) == (0)' failed.
     1: node::Abort() [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     2: 0x1234545 [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     3: 0x12db98a [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     4: node::inspector::Agent::Start(node::NodePlatform*, char const*, node::DebugOptions const&) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     5: node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     6: node::Start(int, char**) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     7: __libc_start_main [/lib64/libc.so.6]
     8: _start [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
    node[27599]: pthread_create: Resource temporarily unavailable
    /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node[27599]: ../src/inspector_io.cc:207:bool node::inspector::InspectorIo::Start(): Assertion `(uv_thread_create(&thread_, InspectorIo::ThreadMain, this)) == (0)' failed.
     1: node::Abort() [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     2: 0x1234545 [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     3: 0x12db98a [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     4: node::inspector::Agent::Start(node::NodePlatform*, char const*, node::DebugOptions const&) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     5: node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     6: node::Start(int, char**) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     7: __libc_start_main [/lib64/libc.so.6]
     8: _start [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
    node[27596]: pthread_create: Resource temporarily unavailable
    /home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node[27596]: ../src/inspector_io.cc:207:bool node::inspector::InspectorIo::Start(): Assertion `(uv_thread_create(&thread_, InspectorIo::ThreadMain, this)) == (0)' failed.
     1: node::Abort() [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     2: 0x1234545 [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     3: 0x12db98a [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     4: node::inspector::Agent::Start(node::NodePlatform*, char const*, node::DebugOptions const&) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     5: node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     6: node::Start(int, char**) [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
     7: __libc_start_main [/lib64/libc.so.6]
     8: _start [/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/out/Release/node]
    Debugger listening on ws://127.0.0.1:12390/f5b2e26d-f286-465d-ac9b-f58bc2ced564
    For help see https://nodejs.org/en/docs/inspector
    assert.js:43
      throw new errors.AssertionError({
      ^
    
    AssertionError [ERR_ASSERTION]: null strictEqual 0
        at Worker.checkExitCode (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/sequential/test-inspector-port-cluster.js:329:10)
        at Worker.<anonymous> (/home/iojs/build/workspace/node-test-commit-linux/nodes/fedora24/test/common/index.js:522:15)
        at Worker.emit (events.js:126:13)
        at ChildProcess.worker.process.once (internal/cluster/master.js:184:12)
        at Object.onceWrapper (events.js:218:13)
        at ChildProcess.emit (events.js:126:13)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:209:12)