堆栈内存溢出
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程序挂在executeBatch上

[英]Program hangs on executeBatch

 原文  2016-03-31 15:39:03  2   1    java/ mysql/ multithreading/ jdbc/ c3p0

问题描述

I am trying to parse through a document and insert the results into a database. 我试图解析文档并将结果插入数据库中。 The document is very large (a few million records) and so I am trying to do it multithreaded with connection pooling via c3p0 and batch processing. 该文档非常大（几百万条记录），因此我尝试通过c3p0和批处理通过连接池对它进行多线程处理。 For every 1000 records parsed, I spin off a thread that will create a PreparedStatement, insert the required series of values, and then add to that PreparedStatement's batch. 对于解析的每1000条记录，我产生一个线程，该线程将创建PreparedStatement，插入所需的一系列值，然后添加到PreparedStatement的批处理中。 However, at the executeBatch function, the program just hangs, and nothing is ever inserted into the database. 但是，在executeBatch函数中，程序只是挂起，并且什么也没有插入到数据库中。 I am wondering if I am using c3p0 improperly or is it something else? 我想知道我是否使用c3p0不正确，还是其他？ I've tried limiting it to the one thread thinking the multithreaded-ness might be the issue but even with just a single thread it still hangs on the execute batch. 我尝试将其限制为一个线程，以为可能是多线程性问题，但是即使只有一个线程，它仍然挂在execute批处理中。

Here's the code that spins off the thread: 这是剥离线程的代码： 

service.submit(new ElementProcessor(source.getConnection(), fElements));

Source is my ComboPooledDataSource and service is an ExecutorService. 源是我的ComboPooledDataSource，服务是ExecutorService。 Also, the constructor for the ElementProcessor class: 另外，ElementProcessor类的构造函数： 

private Connection DB;
public ElementProcessor(Connection db, Element[] elements) {
    DB = db;
    try {
        DB.setAutoCommit(false);
    } catch (SQLException ex) {

    }
    this.elements = elements;
}

The stack trace from the JVM thread dump: JVM线程转储中的堆栈跟踪： 

    2016-03-31 12:17:03
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.40-b16 mixed mode):

"Attach Listener" #34 daemon prio=9 os_prio=31 tid=0x00007fdf6e000000 nid=0x3e0b waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"pool-1-thread-16" #33 prio=5 os_prio=31 tid=0x00007fdf6b970800 nid=0x8103 waiting on condition [0x0000700002b97000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-15" #32 prio=5 os_prio=31 tid=0x00007fdf6e276000 nid=0x7f03 waiting on condition [0x0000700002a94000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-14" #31 prio=5 os_prio=31 tid=0x00007fdf6b228800 nid=0x7d03 waiting on condition [0x0000700002991000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-13" #30 prio=5 os_prio=31 tid=0x00007fdf6c0b8000 nid=0x7b03 waiting on condition [0x000070000288e000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-12" #29 prio=5 os_prio=31 tid=0x00007fdf6b948000 nid=0x7903 waiting on condition [0x000070000278b000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-11" #28 prio=5 os_prio=31 tid=0x00007fdf6abf4000 nid=0x7703 waiting on condition [0x0000700002688000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-10" #27 prio=5 os_prio=31 tid=0x00007fdf6b1b0800 nid=0x7503 waiting on condition [0x0000700002585000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-9" #26 prio=5 os_prio=31 tid=0x00007fdf6d11c800 nid=0x7303 waiting on condition [0x0000700002482000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-8" #25 prio=5 os_prio=31 tid=0x00007fdf6c0fd800 nid=0x7103 waiting on condition [0x000070000237f000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-7" #24 prio=5 os_prio=31 tid=0x00007fdf6d9b1800 nid=0x6f03 waiting on condition [0x000070000227c000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-6" #23 prio=5 os_prio=31 tid=0x00007fdf6c1e8800 nid=0x6d03 waiting on condition [0x0000700002179000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-5" #22 prio=5 os_prio=31 tid=0x00007fdf6e835000 nid=0x6b03 waiting on condition [0x0000700002076000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-4" #21 prio=5 os_prio=31 tid=0x00007fdf6d958800 nid=0x6903 waiting on condition [0x0000700001f73000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-3" #20 prio=5 os_prio=31 tid=0x00007fdf6d138000 nid=0x6703 waiting on condition [0x0000700001e70000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-2" #19 prio=5 os_prio=31 tid=0x00007fdf6e189800 nid=0x6503 waiting on condition [0x0000700001d6d000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-1" #18 prio=5 os_prio=31 tid=0x00007fdf6c1c2800 nid=0x6303 waiting on condition [0x0000700001c6a000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772bcaca0> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"MySQL Statement Cancellation Timer" #17 daemon prio=5 os_prio=31 tid=0x00007fdf6d0c3000 nid=0x6103 in Object.wait() [0x0000700001b67000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772bce798> (a java.util.TaskQueue)
    at java.lang.Object.wait(Object.java:502)
    at java.util.TimerThread.mainLoop(Timer.java:526)
    - locked <0x0000000772bce798> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:505)

"C3P0PooledConnectionPoolManager[identityToken->2rvxu59f1l0as16hejmoc|6477463f, dataSourceName->com.mysql.jdbc.Driver]-DeferredStatementDestroyerThread-#0" #16 daemon prio=5 os_prio=31 tid=0x00007fdf6d058000 nid=0x5f03 in Object.wait() [0x0000700001a64000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772bcecf0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:683)
    - locked <0x0000000772bcecf0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)

"C3P0PooledConnectionPoolManager[identityToken->2rvxu59f1l0as16hejmoc|6477463f, dataSourceName->com.mysql.jdbc.Driver]-HelperThread-#2" #15 daemon prio=5 os_prio=31 tid=0x00007fdf6c07c800 nid=0x5d03 in Object.wait() [0x0000700001961000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772bcf1b0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:683)
    - locked <0x0000000772bcf1b0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)

"C3P0PooledConnectionPoolManager[identityToken->2rvxu59f1l0as16hejmoc|6477463f, dataSourceName->com.mysql.jdbc.Driver]-HelperThread-#1" #14 daemon prio=5 os_prio=31 tid=0x00007fdf6c07c000 nid=0x5b03 in Object.wait() [0x000070000185e000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772bcf1b0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:683)
    - locked <0x0000000772bcf1b0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)

"C3P0PooledConnectionPoolManager[identityToken->2rvxu59f1l0as16hejmoc|6477463f, dataSourceName->com.mysql.jdbc.Driver]-HelperThread-#0" #13 daemon prio=5 os_prio=31 tid=0x00007fdf6c0af000 nid=0x5903 in Object.wait() [0x000070000175b000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772bcf1b0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:683)
    - locked <0x0000000772bcf1b0> (a com.mchange.v2.async.ThreadPoolAsynchronousRunner)

"C3P0PooledConnectionPoolManager[identityToken->2rvxu59f1l0as16hejmoc|6477463f, dataSourceName->com.mysql.jdbc.Driver]-AdminTaskTimer" #12 daemon prio=5 os_prio=31 tid=0x00007fdf6e008000 nid=0x5707 in Object.wait() [0x0000700001658000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772bcef08> (a java.util.TaskQueue)
    at java.util.TimerThread.mainLoop(Timer.java:552)
    - locked <0x0000000772bcef08> (a java.util.TaskQueue)
    at java.util.TimerThread.run(Timer.java:505)

"Service Thread" #9 daemon prio=9 os_prio=31 tid=0x00007fdf6b84b000 nid=0x5303 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C1 CompilerThread3" #8 daemon prio=9 os_prio=31 tid=0x00007fdf6b801000 nid=0x5103 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread2" #7 daemon prio=9 os_prio=31 tid=0x00007fdf6a829800 nid=0x4f03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" #6 daemon prio=9 os_prio=31 tid=0x00007fdf6b028800 nid=0x4d03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #5 daemon prio=9 os_prio=31 tid=0x00007fdf6b026800 nid=0x4b03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=31 tid=0x00007fdf6b01f800 nid=0x3a0f runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=31 tid=0x00007fdf6b01d800 nid=0x3803 in Object.wait() [0x0000700000d3a000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772b9a640> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:142)
    - locked <0x0000000772b9a640> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:158)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" #2 daemon prio=10 os_prio=31 tid=0x00007fdf6b01c800 nid=0x3603 in Object.wait() [0x0000700000c37000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000006c1645268> (a java.lang.ref.Reference$Lock)
    at java.lang.Object.wait(Object.java:502)
    at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:157)
    - locked <0x00000006c1645268> (a java.lang.ref.Reference$Lock)

"main" #1 prio=5 os_prio=31 tid=0x00007fdf6b000800 nid=0x1703 in Object.wait() [0x0000700000219000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000772c33978> (a com.mchange.v2.resourcepool.BasicResourcePool)
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1465)
    at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:644)
    - locked <0x0000000772c33978> (a com.mchange.v2.resourcepool.BasicResourcePool)
    at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:554)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:758)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:685)
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
    at xmltodb.XMLToDB.endElement(XMLToDB.java:103)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:609)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLNSDTDValidator.endNamespaceScope(XMLNSDTDValidator.java:266)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2005)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:879)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2973)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
    at xmltodb.XMLToDB.main(XMLToDB.java:177)

"VM Thread" os_prio=31 tid=0x00007fdf6b01a000 nid=0x3403 runnable 

"GC task thread#0 (ParallelGC)" os_prio=31 tid=0x00007fdf6b805800 nid=0x2403 runnable 

"GC task thread#1 (ParallelGC)" os_prio=31 tid=0x00007fdf6b806000 nid=0x2603 runnable 

"GC task thread#2 (ParallelGC)" os_prio=31 tid=0x00007fdf6b806800 nid=0x2803 runnable 

"GC task thread#3 (ParallelGC)" os_prio=31 tid=0x00007fdf6b807000 nid=0x2a03 runnable 

"GC task thread#4 (ParallelGC)" os_prio=31 tid=0x00007fdf6b808000 nid=0x2c03 runnable 

"GC task thread#5 (ParallelGC)" os_prio=31 tid=0x00007fdf6b808800 nid=0x2e03 runnable 

"GC task thread#6 (ParallelGC)" os_prio=31 tid=0x00007fdf6b809000 nid=0x3003 runnable 

"GC task thread#7 (ParallelGC)" os_prio=31 tid=0x00007fdf6b809800 nid=0x3203 runnable 

"VM Periodic Task Thread" os_prio=31 tid=0x00007fdf6c014800 nid=0x5503 waiting on condition 

JNI global references: 241

1 个解决方案

解决方案1
 0  2016-03-31 17:18:38

Got it! 得到它了！ I had the PreparedStatement doing closeOnCompletion() rather than plain old close() and this was causing it to hang. 我让PreparedStatement做closeOnCompletion（）而不是普通的旧close（），这导致它挂起。

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