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https://issues.apache.org/jira/browse/DERBY-2689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12501707
]
Jim Newsham commented on DERBY-2689:
------------------------------------
We are experiencing deadlock at the same location. This is with Derby
10.2.2.0. The following output comes from jconsole (what a cool tool). Two
threads called Connection.getPreparedStatement(String) simultaneously, each
from a different Connection instance. I doubt the actual sql matters, but here
were the strings: "select id from node where fk_parent_id = ? and name = ?",
"select id from band where fk_node_id = ? and name = ? and type = ?".
Name: Thread-8
State: BLOCKED on [EMAIL PROTECTED] owned by: Thread-20
Total blocked: 48 Total waited: 122
Stack trace:
org.apache.derby.impl.sql.GenericPreparedStatement.finish(Unknown Source)
org.apache.derby.impl.sql.execute.BaseActivation.close(Unknown Source)
org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.addActivation(Unknown
Source)
org.apache.derby.impl.sql.execute.BaseActivation.initFromContext(Unknown
Source)
org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(Unknown
Source)
org.apache.derby.impl.services.reflect.ReflectGeneratedClass.newInstance(Unknown
Source)
org.apache.derby.impl.sql.GenericActivationHolder.<init>(Unknown Source)
org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(Unknown
Source)
- locked [EMAIL PROTECTED]
org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
- locked [EMAIL PROTECTED]
org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
[trace of custom code removed]
-----------------------------
Name: Thread-20
State: BLOCKED on [EMAIL PROTECTED] owned by: Thread-8
Total blocked: 5 Total waited: 112
Stack trace:
org.apache.derby.impl.sql.GenericPreparedStatement.finish(Unknown Source)
org.apache.derby.impl.sql.execute.BaseActivation.close(Unknown Source)
org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.addActivation(Unknown
Source)
org.apache.derby.impl.sql.execute.BaseActivation.initFromContext(Unknown Source)
org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(Unknown
Source)
org.apache.derby.impl.services.reflect.ReflectGeneratedClass.newInstance(Unknown
Source)
org.apache.derby.impl.sql.GenericActivationHolder.<init>(Unknown Source)
org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(Unknown Source)
- locked [EMAIL PROTECTED]
org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
- locked [EMAIL PROTECTED]
org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
[trace of custom code removed]
> Deadlock with GenericPreparedStatement
> --------------------------------------
>
> Key: DERBY-2689
> URL: https://issues.apache.org/jira/browse/DERBY-2689
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.2.2.0
> Environment: Windows
> Reporter: Marc Ewert
>
> We encountered two times a deadlock inside of derby. It seems that we can't
> workaround it. The involved two threads are attached, it looks like a
> classical deadlock:
> "Thread-22" daemon prio=6 tid=0x0cdaa400 nid=0x1c0 waiting for monitor entry
> [0x1317f000..0x1317fd4c]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.derby.impl.sql.GenericPreparedStatement.finish(Unknown
> Source)
> - waiting to lock <0x052f4d70> (a
> org.apache.derby.impl.sql.GenericPreparedStatement)
> at org.apache.derby.impl.sql.execute.BaseActivation.close(Unknown
> Source)
> at
> org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.addActivation(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.BaseActivation.initFromContext(Unknown
> Source)
> at
> org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(Unknown
> Source)
> at
> org.apache.derby.impl.services.reflect.ReflectGeneratedClass.newInstance(Unknown
> Source)
> at org.apache.derby.impl.sql.GenericActivationHolder.<init>(Unknown
> Source)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(Unknown
> Source)
> - locked <0x05306f88> (a
> org.apache.derby.impl.sql.GenericPreparedStatement)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
> Source)
> at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
> Source)
> - locked <0x047beb00> (a org.apache.derby.impl.jdbc.EmbedConnection40)
> at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
> Source)
> [custom methods]
> "ThreadPoolThread-SyncScheduler-3-1" prio=2 tid=0x0e620400 nid=0xfec waiting
> for monitor entry [0x10a7e000..0x10a7fa14]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.derby.impl.sql.GenericPreparedStatement.finish(Unknown
> Source)
> - waiting to lock <0x05306f88> (a
> org.apache.derby.impl.sql.GenericPreparedStatement)
> at org.apache.derby.impl.sql.execute.BaseActivation.close(Unknown
> Source)
> at
> org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.addActivation(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.BaseActivation.initFromContext(Unknown
> Source)
> at
> org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(Unknown
> Source)
> at
> org.apache.derby.impl.services.reflect.ReflectGeneratedClass.newInstance(Unknown
> Source)
> at org.apache.derby.impl.sql.GenericActivationHolder.<init>(Unknown
> Source)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(Unknown
> Source)
> - locked <0x052f4d70> (a
> org.apache.derby.impl.sql.GenericPreparedStatement)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
> Source)
> at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
> Source)
> - locked <0x04225178> (a org.apache.derby.impl.jdbc.EmbedConnection40)
> at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
> Source)
> [custom methods]
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