SERVER-29646 hang_analyzer.py signals python processes before attaching to any processes

(cherry picked from commit 20c5ecac947b69ea8a03660cef8ac1e1251b43e8)

1 files changed, 7 insertions, 5 deletions

diff --git a/buildscripts/hang_analyzer.py b/buildscripts/hang_analyzer.py
index 2729c04bef8..ca1baa00f39 100755
--- a/buildscripts/hang_analyzer.py
+++ b/buildscripts/hang_analyzer.py
@@ -495,11 +495,8 @@ def main():
         for process in processes_orig:
             sys.stdout.write("Ignoring process %d of %s\n" % (process[0], process[1]))
     else:
-        # Dump all other processes first since signaling the python script interrupts it
-        for process in [a for a in processes if not a[1].startswith("python")]:
-            sys.stdout.write("Dumping process %d of %s\n" % (process[0], process[1]))
-            dbg.dump_info(process[0], process[1], sys.stdout)
-
+        # Dump python processes by signalling them. The resmoke.py process will generate
+        # the report.json, when signalled, so we do this before attaching to other processes.
         for process in [a for a in processes if a[1].startswith("python")]:
             # On Windows, we set up an event object to wait on a signal. For Cygwin, we register
             # a signal handler to wait for the signal since it supports POSIX signals.
@@ -512,6 +509,11 @@ def main():
                     (process[1], process[0]))
                 signal_process(process[0], signal.SIGUSR1)
 
+        # Dump all other processes
+        for process in [a for a in processes if not a[1].startswith("python")]:
+            sys.stdout.write("Dumping process %d of %s\n" % (process[0], process[1]))
+            dbg.dump_info(process[0], process[1], sys.stdout)
+
     # Suspend the timer so we can exit cleanly
     timer.cancel()