警告: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@6270b -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 2011-6-24 10:51:42 com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector run 警告: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@6270b -- APPARENT DEADLOCK!!! Complete Status: Managed Threads: 3 Active Threads: 3 Active Tasks: com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4ef630 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2) com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4ec59 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1) com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@138d56e (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0) Pending Tasks: com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@442c76 com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@1c30993 com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@1a9cf52 com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@16a23cf com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@155035a com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4f3ba2 com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@1d41318 Pool thread stack traces: Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2,5,main] java.lang.Thread.sleep(Native Method) com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805) com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547) Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1,5,main] java.lang.Thread.sleep(Native Method) com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805) com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547) Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0,5,main] java.lang.Thread.sleep(Native Method) com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805) com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
查看原因是由于，c3p0配置中url属性里多了个空格引起的。