Hello,
I've deployed a clean installation of Slide 2.1 (as a webapp/.war), and
configured it to be used with MySQL 4.1 which works like a charm. However,
when I try to upload several files that takes a while to transfer at once to
a directory they seem to be uploaded sequentially which hinders concurrent
performance when many users put files. I noticed the configuration-parameter
"sequential-mode" that was set to full in the base installation of slide:
<!-- Can be "off", "write" and "full" -->
<parameter name="sequential-mode">full</parameter>
But when I change it to "off" to allow concurrent puts of files, all PUT's
done while another one is currently uploading eventually fails, with a
Deadlock-error in the logs (see below). Is it not possible to turn off the
sequential-mode to achieve better concurrency in Slide, or have I configured
slide wrong in any way?
Regards, Peder
02 Jul 2005 00:00:53 - org.apache.slide.store.impl.rdbms.MySqlRDBMSAdapter -
ERROR - SQL error 1205 on /files/test/David_o_Mickey_02.tif: Deadlock found
when trying to get lock; Try restarting transaction message from server:
"Lock wait timeout exceeded; try restarting transaction"
java.sql.SQLException: Deadlock found when trying to get lock; Try
restarting transaction message from server: "Lock wait timeout exceeded; try
restarting transaction"
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1997)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1906)
at com.mysql.jdbc.MysqlIO.nextRow(MysqlIO.java:997)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:296)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1325)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2247)
at
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1586)
at
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:92)
at
org.apache.slide.store.impl.rdbms.StandardRDBMSAdapter.retrieveObject(StandardRDBMSAdapter.java:273)
at
org.apache.slide.store.impl.rdbms.AbstractRDBMSStore.retrieveObject(AbstractRDBMSStore.java:416)
at
org.apache.slide.store.AbstractStore.retrieveObject(AbstractStore.java:594)
at
org.apache.slide.store.ExtendedStore.retrieveObject(ExtendedStore.java:574)
...
org.apache.slide.common.ServiceAccessException: Service
[EMAIL PROTECTED] access error : Deadlock
found when trying to get lock; Try restarting transaction message from
server: "Lock wait timeout exceeded; try restarting transaction"
at
org.apache.slide.store.impl.rdbms.MySqlRDBMSAdapter.createException(MySqlRDBMSAdapter.java:66)
at
org.apache.slide.store.impl.rdbms.StandardRDBMSAdapter.retrieveObject(StandardRDBMSAdapter.java:350)
at
org.apache.slide.store.impl.rdbms.AbstractRDBMSStore.retrieveObject(AbstractRDBMSStore.java:416)
...
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