Explicit synchronize on eventLoopGroups object
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@ -278,7 +278,13 @@ class EndPoint {
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// we want to WAIT until after the event executors have completed shutting down.
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List<Future<?>> shutdownThreadList = new LinkedList<Future<?>>();
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for (EventLoopGroup loopGroup : eventLoopGroups) {
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List<EventLoopGroup> loopGroups;
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synchronized (eventLoopGroups) {
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loopGroups = new ArrayList<EventLoopGroup>(eventLoopGroups.size());
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loopGroups.addAll(eventLoopGroups);
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}
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for (EventLoopGroup loopGroup : loopGroups) {
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shutdownThreadList.add(loopGroup.shutdownGracefully(maxShutdownWaitTimeInMilliSeconds,
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maxShutdownWaitTimeInMilliSeconds * 4,
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TimeUnit.MILLISECONDS));
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