If you try to copy large files between machines, you get Connection
Reset (or connection reset by peer, in some OSes)??? If so, you get a
trahsed network card or network hub... I had this problem some time ago,
and I had to exchange a hub with some ports "burned", sending trash in
my network...
Just my 2c,
Richter
Daniel Perry escreveu:
Hi all,
One of our systems has been running fine (live) for the last few weeks until
yesterday when for about half an hour it started randomly crashing. Since
then it has been fine! The (partial) exception trace is below. From what i
can figure the problem is coming from dud mysql connections. However, i
thought that OJB checked the connection before using it by using the
validation query?
I'm using OJB 1.0.0, mysql-connector 3.0.10, and mysql 4.0.18.
Any ideas about what would cause this? Anyway i can prevent it occuring
again?
Thanks,
Daniel.
[org.apache.ojb.broker.accesslayer.StatementsForClassImpl] ERROR: No
operations allowed after connection closed.
Connection was closed due to the following exception:
** BEGIN NESTED EXCEPTION **
java.sql.SQLException
MESSAGE: Communication link failure: java.io.IOException, underlying cause:
Unexpected end of input stream
** BEGIN NESTED EXCEPTION **
java.io.IOException
MESSAGE: Unexpected end of input stream
STACKTRACE:
java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1455)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1826)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1098)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1192)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2051)
at
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1496)
at org.apache.ojb.broker.accesslayer.JdbcAccessImpl.executeQuery(Unknown
Source)
at org.apache.ojb.broker.accesslayer.RsQueryObject.performQuery(Unknown
Source)
at org.apache.ojb.broker.accesslayer.RsIterator.<init>(Unknown Source)
at
org.apache.ojb.broker.core.RsIteratorFactoryImpl.createRsIterator(Unknown
Source)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getRsIteratorFromQuery(Unkn
own Source)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(Unknow
n Source)
at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown
Source)
at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown
Source)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Unknow
n Source)
at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(
Unknown Source)
at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(
Unknown Source)
at
org.apache.ojb.broker.core.proxy.CollectionProxyDefaultImpl.loadData(Unknown
Source)
at org.apache.ojb.broker.core.proxy.ListProxyDefaultImpl.loadData(Unknown
Source)
at
org.apache.ojb.broker.core.proxy.CollectionProxyDefaultImpl.getData(Unknown
Source)
at
org.apache.ojb.broker.core.proxy.CollectionProxyDefaultImpl.iterator(Unknown
Source)
at
org.apache.taglibs.standard.tag.common.core.ForEachSupport.toForEachIterator
(ForEachSupport.java:329)
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