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У меня есть свалка от jstack. Это показывает, что два потока заблокированы на одном объекте locked <0x00000000c0313ce0>. Возможна ли ситуация, когда jstack показывает трассировку стека для первого потока не на тот же момент времени, когда потребовалась трассировка стека для второго thred? Или что еще может быть причиной такой ситуации блокировки?Является ли jstack thread dump согласованным?
"Thread-1" #44 prio=5 os_prio=0 tid=0x000000001c418800 nid=0x922c in Object.wait() [0x0000000018ffe000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at org.h2.mvstore.db.MVTable.doLock1(MVTable.java:242)
at org.h2.mvstore.db.MVTable.lock(MVTable.java:167)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.engine.Database.lockMeta(Database.java:896)
at org.h2.engine.Database.removeMeta(Database.java:919)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.table.Table.removeChildrenAndResources(Table.java:525)
at org.h2.mvstore.db.MVTable.removeChildrenAndResources(MVTable.java:799)
at org.h2.engine.Session.cleanTempTables(Session.java:830)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.engine.Session.close(Session.java:708)
at org.h2.engine.Database.closeAllSessionsException(Database.java:1186)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.engine.Database.close(Database.java:1224)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.engine.DatabaseCloser.run(DatabaseCloser.java:63)
"Resource Destroyer in BasicResourcePool.close()" #110 daemon prio=5 os_prio=0 tid=0x000000001c41a000 nid=0x2d44 in Object.wait() [0x000000001b6ae000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at org.h2.mvstore.db.MVTable.doLock1(MVTable.java:242)
at org.h2.mvstore.db.MVTable.lock(MVTable.java:167)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.engine.Database.lockMeta(Database.java:896)
at org.h2.engine.Database.removeMeta(Database.java:919)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.table.Table.removeChildrenAndResources(Table.java:525)
at org.h2.mvstore.db.MVTable.removeChildrenAndResources(MVTable.java:799)
at org.h2.engine.Session.cleanTempTables(Session.java:830)
- locked <0x00000000c0313ce0> (a org.h2.engine.Database)
at org.h2.engine.Session.close(Session.java:708)
at org.h2.jdbc.JdbcConnection.close(JdbcConnection.java:383)
- locked <0x00000000ede38ce0> (a org.h2.engine.Session)
- locked <0x00000000ede37708> (a org.h2.jdbc.JdbcConnection)
at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:642)
at com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:255)
- locked <0x00000000ee186430> (a com.mchange.v2.c3p0.impl.NewPooledConnection)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:621)
- locked <0x00000000ee186490> (a java.lang.Object)
at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1065)
at com.mchange.v2.resourcepool.BasicResourcePool.destroyResource(BasicResourcePool.java:1090)
at com.mchange.v2.resourcepool.BasicResourcePool.destroyResource(BasicResourcePool.java:1051)
at com.mchange.v2.resourcepool.BasicResourcePool.access$100(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$5.run(BasicResourcePool.java:1305)