[IGNITE-12554] Ignite instance couldn't be restarted if it's parent thread group has been called destroy once

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.6
• Fix Version/s: 2.9
• Component/s: cache
• Release Note: Do not use dedicated ThreadGroup for IgniteThread threads anymore.
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Ivan Pavlukhin
• Reporter: ha faculty
• Created: 18/Jan/20 17:39
• Updated: 07/May/20 11:40
• Resolved: 01/Feb/20 07:04

Description

I am using an inhouse platform which manage the life cycle of ignite instance by calling ignition.start() and ignition.stop() from a web application.

it could be started without issue for the first time. however, if it stop the ignite by calling ignition.stop() and followed by destroying the parent thread group which starting it.

Calling ignition.start() in the 2nd time will throw the following exception 

Exception in thread "kickOff" java.lang.IllegalThreadStateExceptionException in thread "kickOff" java.lang.IllegalThreadStateException at java.lang.ThreadGroup.addUnstarted(ThreadGroup.java:867) at java.lang.Thread.init(Thread.java:405) at java.lang.Thread.init(Thread.java:349) at java.lang.Thread.<init>(Thread.java:599) at org.apache.ignite.thread.IgniteThread.<init>(IgniteThread.java:96) at org.apache.ignite.internal.util.StripedExecutor$Stripe.start(StripedExecutor.java:474) at org.apache.ignite.internal.util.StripedExecutor.<init>(StripedExecutor.java:121) at org.apache.ignite.internal.util.StripedExecutor.<init>(StripedExecutor.java:80) at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start0(IgnitionEx.java:1842) at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start(IgnitionEx.java:1730) at org.apache.ignite.internal.IgnitionEx.start0(IgnitionEx.java:1158) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:589) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:565) at org.apache.ignite.Ignition.start(Ignition.java:305) at com.faculty.poc.ignite.app.NodeRestartTesting.run(NodeRestartTesting.java:60) at java.lang.Thread.run(Thread.java:748)

Please find my demo code for this issue.

Walk through into Ignite code, it should be caused by a static thread group created in IgniteThread class. (private static final ThreadGroup DFLT_GRP = new ThreadGroup("ignite")

Destroyed the parent thread group which start the ignite instance will result in causing the DFLT_GRP go into destroyed state. Therefore, when Ignite was start ifor the 2nd time, this static thread group has been destroyed and no longer able to run the ignite. 

 

 

Issue Links

• is related to: IGNITE-12990 Remove static thread group from IgniteSpiThread
• links to: dev-list thread
• links to: GitHub Pull Request #7297