Thread leak or expected behavior with fibers ? #1181
Description
I use simple gem fastimage to fetch image metadata, gem uses Fibers
When i run loop in console and watch for jruby process through jmap i see what count org.jruby.RubyThread objects and other thread related objects increased by time
Sample loop
10_000.times { fastimage = FastImage.new(src); fastimage.size; fastimage.type }
jmap output
86: 1173 93904 [Ljava.lang.ThreadLocal$ThreadLocalMap$Entry;
102: 582 65184 org.jruby.runtime.ThreadContext
104: 594 61776 java.lang.Thread
109: 1780 56960 java.lang.ThreadLocal$ThreadLocalMap$Entry
116: 583 51304 org.jruby.RubyThread
138: 582 32592 org.jruby.ext.fiber.ThreadFiber
144: 587 28176 java.util.concurrent.ThreadPoolExecutor$Worker
145: 1173 28152 java.lang.ThreadLocal$ThreadLocalMap
195: 583 13992 org.jruby.internal.runtime.NativeThread
198: 581 13944 org.jruby.ext.fiber.ThreadFiber$1
287: 2 4160 [Ljava.lang.Thread;
639: 23 368 java.lang.ThreadLocal
823: 7 224 org.jruby.ext.thread.Mutex
825: 4 224 java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask
834: 3 216 java.util.concurrent.ThreadPoolExecutor
959: 2 160 org.jruby.ext.thread.SizedQueue$INVOKER$i$1$0$push
1214: 3 144 java.lang.ThreadGroup
1236: 5 120 org.jruby.ext.fiber.ThreadFiberState
Environment:
MacOs,
java version "1.7.0_17"
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode),
jruby 1.7.2 (1.9.3p327) 2013-01-04 302c706 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_17-b02 [darwin-x86_64]