On 29.10.2015 09:09, simone.rodenbach....@devk.de wrote:
Hi Christopher,
I attachted some pictures of the threads.
Thx,
Simone
Hi Simone.
Christopher is in the USA, so it will take some time before he responds.
For the sake of gaining some time however : your attachments did not make it to the list,
which strips most attachments.
Better : use a text editor to cut and paste the stack trace right here :
-----Ursprüngliche Nachricht-----
Von: Christopher Schultz [mailto:ch...@christopherschultz.net]
Gesendet: Mittwoch, 28. Oktober 2015 15:30
An: Tomcat Users List
Betreff: Re: AW: Tomcat 6, DB2 Driver Problems
Simone,
On 10/28/15 4:02 AM, simone.rodenbach....@devk.de wrote:
I tried to google for the driver and classloader and found nothing that helped
me :-(
I can only provide you with this information:
I configured the datasource in the context.xml
<Resource name="jdbc/xxx" auth="Container" type="javax.sql.DataSource"
factory="org.apache.commons.dbcp.BasicDataSourceFactory"
Why are you overriding Tomcat's default DataSourceFactory with another one?
maxActive="10" minIdle="2" maxIdle="10" maxWait="10000"
minEvictableIdleTimeMillis="120000" timeBetweenEvictionRunsMillis="60000"
username="xxx"
password="xxx"
driverClassName="com.ibm.db2.jcc.DB2Driver"
url="xxx;"
validationQuery="select 1 from sysibm.sysdummy1" />
The spring bean
<jee:jndi-lookup id="dataSource" jndi-name="java:/comp/env/jdbc/xxx"
expected-type="javax.sql.DataSource" />
I created a test project. Because oft hat I'm sure that I don't start a thread.
It doesn't have to be *your code* starting the thread directly. JDBC
drivers have a habit of launching their own cleanup threads and then not
offering any interface to stop them.
But the log says:
Okt 28, 2015 8:41:15 AM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SCHWERWIEGEND: The web application [/test] appears to have started a thread
named [Timer-0] but has failed to stop it. This is very likely to create a
memory leak.
I think this thread is started from
org.apache.commons.dbcp.BasicDataSourceFactory.
Nope, BasicDataSourceFactory doesn't have the word "thread" anywhere in
its code:
http://svn.apache.org/viewvc/commons/proper/dbcp/tags/DBCP_1_4/src/java/org/apache/commons/dbcp/BasicDataSourceFactory.java?view=markup
I removed the db2cc4.jar to get an exception to inspect from where the driver
is loaded and got:
Caused by: java.lang.ClassNotFoundException: com.ibm.db2.jcc.DB2Driver
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1858)
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1709)
at
org.apache.commons.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1420)
That only tells you where the driver is loaded. It doesn't tell you when
the thread was launched.
After shutting-down your web application (and getting the warning about
the Timer-0 thread), can you take a thread dump and show us the stack
trace for the Timer-0 thread?
-chris
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