[CLOUDSTACK-8611] CS waits indefinitely for CheckS2SVpnConnectionsCommand to return

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.9.0
• Security Level: Public (Anyone can view this level - this is the default.)
• Assignee: Suresh Kumar Anaparti
• Reporter: Likitha Shetty
• Created: 02/Jul/15 09:02
• Updated: 22/Apr/16 05:08
• Resolved: 22/Apr/16 05:08

Description

On one instance, CS began to execute CheckS2SVpnConnectionsCommand command on a router but the command result was never returned to the MS. If a command never returns, then 'DirectAgent' thread executing this command is blocked indefinitely and cannot pick up any other request.
Now since this command is designed to execute in sequence on a host and is run regularly, every execution of that command thereafter on that particular host ended up picking up a DirectAgent thread and waiting for the previous execution to complete. And hence overtime, the host ended up using and blocking all 'DirectAgent' threads indefinitely.