{"action":"created","comment":{"url":"https://api.github.com/repos/idaholab/moose/pulls/comments/60830023","id":60830023,"diff_hunk":"@@ -30,14 +30,26 @@ ExodusTimeSequenceStepper::ExodusTimeSequenceStepper(const InputParameters & par\n     TimeSequenceStepperBase(parameters),\n     _mesh_file(getParam<MeshFileName>(\"mesh\"))\n {\n-  // Check that the required file exists\n-  MooseUtils::checkFileReadable(_mesh_file);\n+  // Read the Exodus file on processor 0\n+  std::vector<Real> times;\n+  if (processor_id() == 0)\n+  {\n+    // Check that the required file exists\n+    MooseUtils::checkFileReadable(_mesh_file);\n \n-  // dummy mesh\n-  SerialMesh mesh(_communicator);\n+    // dummy mesh\n+    SerialMesh mesh(_communicator);\n \n-  // Read the Exodus file\n-  ExodusII_IO exodusII_io(mesh);\n-  exodusII_io.read(_mesh_file);\n-  setupSequence(exodusII_io.get_time_steps());\n+    ExodusII_IO exodusII_io(mesh);\n+    exodusII_io.read(_mesh_file);\n+    times = exodusII_io.get_time_steps();\n+  }\n+\n+  // distribute timestep list\n+  unsigned int num_steps = times.size();\n+  _communicator.broadcast(num_steps);\n+  times.resize(num_steps);\n+  _communicator.broadcast(times);","path":"framework/src/timesteppers/ExodusTimeSequenceStepper.C","position":31,"original_position":31,"commit_id":"343b5dcc81cdee36366aeddda32802a96db42982","original_commit_id":"343b5dcc81cdee36366aeddda32802a96db42982","user":{"login":"roystgnr","id":2367346,"avatar_url":"https://avatars.githubusercontent.com/u/2367346?v=3","gravatar_id":"","url":"https://api.github.com/users/roystgnr","html_url":"https://github.com/roystgnr","followers_url":"https://api.github.com/users/roystgnr/followers","following_url":"https://api.github.com/users/roystgnr/following{/other_user}","gists_url":"https://api.github.com/users/roystgnr/gists{/gist_id}","starred_url":"https://api.github.com/users/roystgnr/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/roystgnr/subscriptions","organizations_url":"https://api.github.com/users/roystgnr/orgs","repos_url":"https://api.github.com/users/roystgnr/repos","events_url":"https://api.github.com/users/roystgnr/events{/privacy}","received_events_url":"https://api.github.com/users/roystgnr/received_events","type":"User","site_admin":false},"body":"\nEither broadcast was written by Ben, or it was written by me before I knew probe existed.  Probably the latter.  IIRC even with send/receive the original vector implementation was \"send a size explicitly first\", and when we upgraded those we must have missed upgrading broadcast 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