Notify io_service before forking (for pausing) python in bgp_stress_test

[Ananth Suryanarayana]

If io-service is not notified, fork() messes up ip read and write in the parent

diff --git a/src/bgp/test/bgp_stress_test.cc b/src/bgp/test/bgp_stress_test.cc
index 9d71e69..6b0d858 100644
--- a/src/bgp/test/bgp_stress_test.cc
+++ b/src/bgp/test/bgp_stress_test.cc
@@ -2520,9 +2520,14 @@ void BgpStressTest::Pause(string message) {
         return;
     cout << message;
     BGP_DEBUG_UT(message);
+
+ evm_.io_service()->notify_fork(boost::asio::io_service::fork_prepare);
     pid_t pid;
- if (!(pid = fork()))
+ if (!(pid = fork())) {
+ evm_.io_service()->notify_fork(boost::asio::io_service::fork_child);
         execl("/usr/bin/python", "/usr/bin/python", NULL);
+ }
+ evm_.io_service()->notify_fork(boost::asio::io_service::fork_parent);
     int status;
     waitpid(pid, &status, 0);
     HEAP_PROFILER_DUMP("bgp_stress_test");

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/22025
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/22026
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/22027
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/22025
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/22026
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/22027
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/22025
Committed: http://github.org/Juniper/contrail-controller/commit/db07937455d0fde16ade37ad47170476f17ef724
Submitter: Zuul
Branch: master

commit db07937455d0fde16ade37ad47170476f17ef724
Author: Ananth Suryanarayana <email address hidden>
Date: Thu Jul 14 17:52:27 2016 -0700

Do fork() pythob safely in bgp_stress_test inorder to pause

boost asio io-service must be properly notified before forking any child process

Change-Id: Iad52c70381ec19c956161d13a55c355e61b98eb4
Closes-Bug: 1603259

[Ananth Suryanarayana (anantha-l)]

This is a test specific issue and hence not a blocker. Also a work around has been found (to set an env variable) to continue testing