Tomcat 7 - Failed to start component - with DB2 jars

When i deployed my old app on Tomcat 7.0.26 , i get the next error while start up my site.


EVERE: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/YANIV_DEV]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.tomcat.util.bcel.classfile.ClassFormatException: null is not a Java .class file
at org.apache.tomcat.util.bcel.classfile.ClassParser.readID(ClassParser.java:238)
at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:114)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2032)
at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1923)
at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1891)
at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1877)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1270)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:855)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Mar 8, 2012 3:26:36 PM org.apache.catalina.startup.HostConfig deployDirectory
SEVERE: Error deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\YANIV_DEV
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/YANIV_DEV]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)



The solution for such error was:

I changed the  $TOMCAT_HOME/conf/catalina.properties and i add db2jcc4.jar to tomcat.util.scan.DefaultJarScanner.jarsToSkip property value.
It is used to turn off classpath scanning (which is used across JavaEE 6 specs implementations).


i found the solution here
db2 - Including DB2JCC4 in Tomcat 7:

enjoy
Yaniv Tzanany