JVM hangs with specific testcase judging #2
Description
`2019-04-01 22:34:18
Full thread dump Java HotSpot(TM) 64-Bit Server VM (11.0.1+13-LTS mixed mode):
Threads class SMR info:
_java_thread_list=0x000001ee9991a320, length=11, elements={
0x000001eef3f24000, 0x000001eefed41000, 0x000001eeff5fe800, 0x000001eeff65d800,
0x000001eeff65f000, 0x000001eeff669000, 0x000001eeff690800, 0x000001eefed49000,
0x000001eeff5d0800, 0x000001eeff913800, 0x000001eeff914000
}
"main" #1 prio=5 os_prio=0 cpu=734.38ms elapsed=39.66s tid=0x000001eef3f24000 nid=0x13d8 waiting on condition [0x0000002bee1ff000]
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park(java.base@11.0.1/Native Method)
- parking to wait for <0x000000070fe15270> (a java.util.concurrent.CountDownLatch$Sync)
at java.util.concurrent.locks.LockSupport.park(java.base@11.0.1/LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(java.base@11.0.1/AbstractQueuedSynchronizer.java:885)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(java.base@11.0.1/AbstractQueuedSynchronizer.java:1039)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(java.base@11.0.1/AbstractQueuedSynchronizer.java:1345)
at java.util.concurrent.CountDownLatch.await(java.base@11.0.1/CountDownLatch.java:232)
at xyz.chengzi.offlinejudge.runtime.Judge.judge(Judge.java:78)
at xyz.chengzi.offlinejudge.OfflineJudge.judge(OfflineJudge.java:40)
at xyz.chengzi.offlinejudge.OfflineJudge.main(OfflineJudge.java:26)
Locked ownable synchronizers:
- None
"Reference Handler" #2 daemon prio=10 os_prio=2 cpu=0.00ms elapsed=39.64s tid=0x000001eefed41000 nid=0x21dc waiting on condition [0x0000002bee8ff000]
java.lang.Thread.State: RUNNABLE
at java.lang.ref.Reference.waitForReferencePendingList(java.base@11.0.1/Native Method)
at java.lang.ref.Reference.processPendingReferences(java.base@11.0.1/Reference.java:241)
at java.lang.ref.Reference$ReferenceHandler.run(java.base@11.0.1/Reference.java:213)
Locked ownable synchronizers:
- None
"Finalizer" #3 daemon prio=8 os_prio=1 cpu=0.00ms elapsed=39.64s tid=0x000001eeff5fe800 nid=0xc68 in Object.wait() [0x0000002bee9fe000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(java.base@11.0.1/Native Method)
- waiting on <0x00000007011efe20> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(java.base@11.0.1/ReferenceQueue.java:155)
- waiting to re-lock in wait() <0x00000007011efe20> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(java.base@11.0.1/ReferenceQueue.java:176)
at java.lang.ref.Finalizer$FinalizerThread.run(java.base@11.0.1/Finalizer.java:170)
Locked ownable synchronizers:
- None
"Signal Dispatcher" #4 daemon prio=9 os_prio=2 cpu=0.00ms elapsed=39.63s tid=0x000001eeff65d800 nid=0x1cbc runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"Attach Listener" #5 daemon prio=5 os_prio=2 cpu=0.00ms elapsed=39.63s tid=0x000001eeff65f000 nid=0x51b4 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"C2 CompilerThread0" #6 daemon prio=9 os_prio=2 cpu=562.50ms elapsed=39.63s tid=0x000001eeff669000 nid=0x2e68 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
No compile task
Locked ownable synchronizers:
- None
"C1 CompilerThread0" #9 daemon prio=9 os_prio=2 cpu=390.63ms elapsed=39.63s tid=0x000001eeff690800 nid=0x2a44 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
No compile task
Locked ownable synchronizers:
- None
"Sweeper thread" #10 daemon prio=9 os_prio=2 cpu=0.00ms elapsed=39.63s tid=0x000001eefed49000 nid=0x46c runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"Common-Cleaner" #11 daemon prio=8 os_prio=1 cpu=0.00ms elapsed=39.60s tid=0x000001eeff5d0800 nid=0x12dc in Object.wait() [0x0000002beefff000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(java.base@11.0.1/Native Method)
- waiting on <0x00000007011fd5b0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(java.base@11.0.1/ReferenceQueue.java:155)
- waiting to re-lock in wait() <0x00000007011fd5b0> (a java.lang.ref.ReferenceQueue$Lock)
at jdk.internal.ref.CleanerImpl.run(java.base@11.0.1/CleanerImpl.java:148)
at java.lang.Thread.run(java.base@11.0.1/Thread.java:834)
at jdk.internal.misc.InnocuousThread.run(java.base@11.0.1/InnocuousThread.java:134)
Locked ownable synchronizers:
- None
"Monitor Ctrl-Break" #12 daemon prio=5 os_prio=0 cpu=0.00ms elapsed=39.56s tid=0x000001eeff913800 nid=0x13ec runnable [0x0000002bef0fe000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(java.base@11.0.1/Native Method)
at java.net.SocketInputStream.socketRead(java.base@11.0.1/SocketInputStream.java:115)
at java.net.SocketInputStream.read(java.base@11.0.1/SocketInputStream.java:168)
at java.net.SocketInputStream.read(java.base@11.0.1/SocketInputStream.java:140)
at sun.nio.cs.StreamDecoder.readBytes(java.base@11.0.1/StreamDecoder.java:284)
at sun.nio.cs.StreamDecoder.implRead(java.base@11.0.1/StreamDecoder.java:326)
at sun.nio.cs.StreamDecoder.read(java.base@11.0.1/StreamDecoder.java:178)
- locked <0x0000000701206658> (a java.io.InputStreamReader)
at java.io.InputStreamReader.read(java.base@11.0.1/InputStreamReader.java:185)
at java.io.BufferedReader.fill(java.base@11.0.1/BufferedReader.java:161)
at java.io.BufferedReader.readLine(java.base@11.0.1/BufferedReader.java:326)
- locked <0x0000000701206658> (a java.io.InputStreamReader)
at java.io.BufferedReader.readLine(java.base@11.0.1/BufferedReader.java:392)
at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:64)
Locked ownable synchronizers:
- None
"Service Thread" #13 daemon prio=9 os_prio=0 cpu=0.00ms elapsed=39.56s tid=0x000001eeff914000 nid=0x2964 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"VM Thread" os_prio=2 cpu=0.00ms elapsed=39.64s tid=0x000001eefed3e000 nid=0x1860 runnable
"GC Thread#0" os_prio=2 cpu=15.63ms elapsed=39.66s tid=0x000001eef3f3b800 nid=0x3b84 runnable
"GC Thread#1" os_prio=2 cpu=15.63ms elapsed=39.16s tid=0x000001ee9991f000 nid=0x43cc runnable
"GC Thread#2" os_prio=2 cpu=15.63ms elapsed=39.16s tid=0x000001ee9991f800 nid=0x5144 runnable
"GC Thread#3" os_prio=2 cpu=15.63ms elapsed=39.16s tid=0x000001ee998e0800 nid=0x53d8 runnable
"GC Thread#4" os_prio=2 cpu=15.63ms elapsed=39.16s tid=0x000001ee998e1800 nid=0x4208 runnable
"GC Thread#5" os_prio=2 cpu=15.63ms elapsed=39.16s tid=0x000001ee998e2000 nid=0xd48 runnable
"G1 Main Marker" os_prio=2 cpu=0.00ms elapsed=39.66s tid=0x000001eef3f9b000 nid=0x53c0 runnable
"G1 Conc#0" os_prio=2 cpu=0.00ms elapsed=39.66s tid=0x000001eef3f9e800 nid=0x18ac runnable
"G1 Conc#1" os_prio=2 cpu=0.00ms elapsed=38.91s tid=0x000001ee99f0f000 nid=0x41ac runnable
"G1 Conc#2" os_prio=2 cpu=0.00ms elapsed=38.91s tid=0x000001ee99f10000 nid=0x33dc runnable
"G1 Refine#0" os_prio=2 cpu=0.00ms elapsed=39.65s tid=0x000001eefec27800 nid=0x13d0 runnable
"G1 Young RemSet Sampling" os_prio=2 cpu=0.00ms elapsed=39.65s tid=0x000001eefec28800 nid=0xee4 runnable
"VM Periodic Task Thread" os_prio=2 cpu=0.00ms elapsed=39.56s tid=0x000001eeff916000 nid=0x5234 waiting on condition
JNI global refs: 16, weak refs: 0
`
Possibly a jvm deadlock?