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From "Ashlesha (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-6831) org.apache.derby.client.am.DisconnectException: A communications error has been detected: Read timed out.
Date Fri, 04 Sep 2015 06:36:45 GMT
Ashlesha created DERBY-6831:
-------------------------------

             Summary:  org.apache.derby.client.am.DisconnectException: A communications error
has been detected: Read timed out.
                 Key: DERBY-6831
                 URL: https://issues.apache.org/jira/browse/DERBY-6831
             Project: Derby
          Issue Type: Bug
    Affects Versions: 10.5.3.0
         Environment: Windows 2003
            Reporter: Ashlesha


We are using derby server 10.5.3.0 version with our product where we are consistently getting
below connection timed out error   :
Caused by: java.sql.SQLException: A communications error has been detected: Read timed out.
	at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
	at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
	at org.apache.derby.client.am.PreparedStatement.executeQuery(Unknown Source)
	at com.ibm.ac.si.iuregistry.IUTypeDatabaseImpl.orderInstanceIDsByTimeStamp(IUTypeDatabaseImpl.java:7359)
	at com.ibm.ac.si.iuregistry.IUTypeDatabaseImpl.listUndoOrder(IUTypeDatabaseImpl.java:10124)
	... 18 more
Caused by: org.apache.derby.client.am.DisconnectException: A communications error has been
detected: Read timed out.
	at org.apache.derby.client.net.NetAgent.throwCommunicationsFailure(Unknown Source)
	at org.apache.derby.client.net.Reply.fill(Unknown Source)
	at org.apache.derby.client.net.Reply.ensureALayerDataInBuffer(Unknown Source)
	at org.apache.derby.client.net.Reply.readDssHeader(Unknown Source)
	at org.apache.derby.client.net.Reply.startSameIdChainParse(Unknown Source)
	at org.apache.derby.client.net.NetStatementReply.readOpenQuery(Unknown Source)
	at org.apache.derby.client.net.StatementReply.readOpenQuery(Unknown Source)
	at org.apache.derby.client.net.NetStatement.readOpenQuery_(Unknown Source)
	at org.apache.derby.client.am.Statement.readOpenQuery(Unknown Source)
	at org.apache.derby.client.am.PreparedStatement.flowExecute(Unknown Source)
	at org.apache.derby.client.am.PreparedStatement.executeQueryX(Unknown Source)
	... 21 more
Caused by: java.net.SocketTimeoutException: Read timed out
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.read(SocketInputStream.java:155)
	... 31 more

The derby logs doesn't show any error message but for the last prepared statement query it
waits for sometime (around 5 mins) and then our program comes out i.e it ends with connection
timed out error .

Derby log statements :

2015-09-03 09:40:01.308 GMT Thread[DRDAConnThread_8,5,derby.daemons] (XID = 6580), (SESSIONID
= 3), (DATABASE = IURegistryDB), (DRDAID = NF000001.G418-1011056675071531060{4}), Begin compiling
prepared statement: SELECT IUI.INSTANCE_ID FROM IU_INSTANCE IUI WHERE IUI.INSTANCE_ID IN (?,?)
ORDER BY IUI.CREATED_TIME DESC :End prepared statement
2015-09-03 09:40:01.308 GMT Thread[DRDAConnThread_8,5,derby.daemons] (XID = 6580), (SESSIONID
= 3), (DATABASE = IURegistryDB), (DRDAID = NF000001.G418-1011056675071531060{4}), End compiling
prepared statement: SELECT IUI.INSTANCE_ID FROM IU_INSTANCE IUI WHERE IUI.INSTANCE_ID IN (?,?)
ORDER BY IUI.CREATED_TIME DESC :End prepared statement
2015-09-03 09:40:01.324 GMT Thread[DRDAConnThread_8,5,derby.daemons] (XID = 6580), (SESSIONID
= 3), (DATABASE = IURegistryDB), (DRDAID = NF000001.G418-1011056675071531060{4}), Executing
prepared statement: SELECT IUI.INSTANCE_ID FROM IU_INSTANCE IUI WHERE IUI.INSTANCE_ID IN (?,?)
ORDER BY IUI.CREATED_TIME DESC :End prepared statement with 2 parameters begin parameter #1:
NULL :end parameter begin parameter #2: f26326912b681e5b:77389106:14f73d7488b:-778a :end parameter

2015-09-03 09:42:03.105 GMT Thread[DRDAConnThread_9,5,derby.daemons] (XID = 424), (SESSIONID
= 3), (DATABASE = TouchPointRegistryDB), (DRDAID = NF000001.G534-868067386902462499{5}), Rolling
back
2015-09-03 09:42:03.105 GMT Thread[DRDAConnThread_9,5,derby.daemons] (XID = 424), (SESSIONID
= 3), (DATABASE = TouchPointRegistryDB), (DRDAID = NF000001.G534-868067386902462499{5}), Rolling
back
2015-09-03 09:48:54.777 GMT Thread[DRDAConnThread_7,5,derby.daemons] (XID = 382), (SESSIONID
= 1), (DATABASE = TouchPointRegistryDB), (DRDAID = NF000001.H380-508905316620002396{3}), Committing
2015-09-03 09:48:54.777 GMT Thread[DRDAConnThread_5,5,derby.daemons] (XID = 6545), (SESSIONID
= 1), (DATABASE = IURegistryDB), (DRDAID = NF000001.H37F-592784859679789228{2}), Committing
2015-09-03 09:48:54.777 GMT Thread[DRDAConnThread_7,5,derby.daemons] (XID = 382), (SESSIONID
= 1), (DATABASE = TouchPointRegistryDB), (DRDAID = NF000001.H380-508905316620002396{3}), Rolling
back
2015-09-03 09:48:54.777 GMT Thread[DRDAConnThread_7,5,derby.daemons] (XID = 382), (SESSIONID
= 1), (DATABASE = TouchPointRegistryDB), (DRDAID = NF000001.H380-508905316620002396{3}), Rolling
back
2015-09-03 09:48:54.777 GMT Thread[DRDAConnThread_5,5,derby.daemons] (XID = 6545), (SESSIONID
= 1), (DATABASE = IURegistryDB), (DRDAID = NF000001.H37F-592784859679789228{2}), Rolling back
2015-09-03 09:48:54.777 GMT Thread[DRDAConnThread_5,5,derby.daemons] (XID = 6545), (SESSIONID
= 1), (DATABASE = IURegistryDB), (DRDAID = NF000001.H37F-592784859679789228{2}), Rolling back

Not sure why derby connection is timed out. Could you please go through the derby log and
help us to understand the cause of failure?



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