Sometimes while redeploing Appfuse application in tomcat 5.x (with reloadable="true" in context.xml) I'm getting
the following error in catalina.out :

ERROR [ContainerBackgroundProcessor[StandardEngine[Catalina]]]
ContextLoader.initWebApplicationContext(182) | Context initialization
failed
java.lang.InternalError: jzentry == 0,
jzfile = 141476144,
total = 41,
name = /home/serega/tomcat/webapps/pcc/WEB-INF/lib/pcc-dao.jar,
i = 9,
message = invalid LOC header (bad signature)
       at java.util.zip.ZipFile$3.nextElement(ZipFile.java:430)
       at java.util.zip.ZipFile$3.nextElement(ZipFile.java:416)
       at java.util.jar.JarFile$1.nextElement(JarFile.java:214)
       at java.util.jar.JarFile$1.nextElement(JarFile.java:213)
       at
org.springframework.core.io.support.PathMatchingResourcePatternResolver.doFindPathMatchingJarResources(PathMatchingResourcePatternResolver.java:322)

It can be cured only by restarting tomcat and happens 2 or 3 times a day
on regular basis.

Futher investigations showed that errors happen then spring context files are loaded (it can be seen from stack trace :)).

Workaround
-----------------------
Workaround for this problem is to load context xml files from WEB-INF directory instead of jars.
It can be accomplished with following changes in web.xml and build.xml :

- comment out second config location line in the web-settings.xml
to force Spring use only /WEB-INF files :

        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/applicationContext-*.xml
<!-- classpath*:META-INF/applicationContext-*.xml-->
        </param-value>
    </context-param>

- add the following lines into the package-web ant task before war task:

        <copy tofile="${webapp.dist}/applicationContext-service.xml"
overwrite="true">
            <fileset dir="src/service" includes="**/*-service.xml"/>
        </copy>
        <copy tofile="${webapp.dist}/applicationContext-hibernate.xml"
overwrite="true">
            <fileset dir="src/dao" includes="**/*-hibernate.xml"/>
            <filterset refid="variables.to.replace"/>
        </copy>

- and add 2 lines inside the package-web's war task :

            <webinf dir="${webapp.dist}"
includes="applicationContext-service.xml"/>
            <webinf dir="${webapp.dist}"
includes="applicationContext-hibernate.xml"/>

Below is my modified package-web task :

    <target name="package-web" depends="compile-web,jsp-2"
description="Package WAR">
        <propertyfile comment="Build Information"
file="${build.dir}/web/classes/build.properties">
            <entry key="build.date" type="date" pattern="EEEE MMM dd,
yyyy" value="now"/>
            <entry key="build.time" type="date" pattern="hh:mm:ss a zz"
value="now"/>
            <entry key="build.username" value="${user.name}"/>
            <entry key="build.computer" value="${env.COMPUTERNAME}"/>
            <entry key="build.dao.type" value="${dao.type}"/>
            <entry key="webapp.version" value="${webapp.version}"/>
        </propertyfile>
        <!-- If Tomcat 5, uncomment the <dispatcher> elements in
filter-mappings -->
        <if>
            <or>
                <isset property="tomcat5"/>
                <isset property="tomcat5.5"/>
            </or>
            <then>
                <replaceregexp flags="g"
                    file="${webapp.target}/WEB-INF/web.xml"
                    match='&lt;!--dispatcher&gt;'
                    replace='&lt;dispatcher&gt;'/>
                <replaceregexp flags="g"
                    file="${webapp.target}/WEB-INF/web.xml"
                    match='&lt;/dispatcher--&gt;'
                    replace='&lt;/dispatcher&gt;'/>
            </then>
        </if>
        <echo>Preparing tomcat-context.xml for inclusion in war</echo>
        <!-- Copy tomcat-context.xml file to context.xml -->
        <if>
            <and>
                <isset property="tomcat5"/>
                <not><isset property="tomcat5.5"/></not>
            </and>
            <then>
                <copy tofile="${webapp.dist}/context.xml"
                    file="metadata/conf/tomcat-context.xml"
overwrite="true">
                    <filterset refid="db.variables"/>
                </copy>
            </then>
            <elseif>
                <isset property="tomcat5.5"/>
                <then>
                    <copy tofile="${webapp.dist}/context.xml"
                        file="metadata/conf/tomcat-context-5.5.xml"
overwrite="true">
                        <filterset refid="db.variables"/>
                    </copy>
                </then>
            </elseif>
        </if>

        <!-- added -->
        <copy tofile="${webapp.dist}/applicationContext-service.xml"
overwrite="true">
            <fileset dir="src/service" includes="**/*-service.xml"/>
        </copy>
        <copy tofile="${webapp.dist}/applicationContext-hibernate.xml"
overwrite="true">
            <fileset dir="src/dao" includes="**/*-hibernate.xml"/>
            <filterset refid="variables.to.replace"/>
        </copy>


        <!-- Copy .properties files in src tree to build/web/classes -->
        <copy todir="${build.dir}/web/classes">
            <fileset dir="src/web">
                <include name="**/*.properties"/>
                <include name="**/*.xml"/>
            </fileset>
        </copy>

        <echo>before war task</echo>
        <war destfile="${webapp.dist}/${webapp.war}"
            webxml="${webapp.target}/WEB-INF/web.xml" compress="true">
            <fileset dir="${webapp.target}"
excludes="**/web.xml,**/*-resources.xml"/>
            <metainf dir="${webapp.dist}" includes="context.xml"/>

            <classes dir="${build.dir}/web/classes">
                <exclude name="**/database.properties"/>
            </classes>

            <lib file="${dist.dir}/${webapp.name}-dao.jar"/>
            <lib file="${dist.dir}/${webapp.name}-service.jar"/>



            <webinf dir="web/WEB-INF"
                includes="*-resources.xml"/>

            <!-- added -->
            <webinf dir="${webapp.dist}"
includes="applicationContext-service.xml"/>
            <webinf dir="${webapp.dist}"
includes="applicationContext-hibernate.xml"/>

            <webinf dir="${struts.dir}" includes="*.xml"/>

            <lib file="${clickstream.jar}"/>
            <lib dir="${struts.dir}" includes="*.jar"/>
            <lib dir="${jstl.dir}/lib">
                <include name="jstl.jar"/>
                <include name="standard.jar"/>
            </lib>
            <lib dir="${javamail.dir}" includes="*.jar"/>
            <lib file="${log4j.jar}"/>
            <lib file="${strutsmenu.jar}"/>
            <lib dir="${displaytag.dir}" includes="*.jar"/>
            <lib file="${hibernate.jar}"/>
            <lib dir="${hibernate.dir}/lib" includes="*.jar"
excludes="jta.jar"/>
            <lib dir="${spring.dir}" includes="*.jar"
excludes="*mock.jar"/>
            <lib file="${sitemesh.jar}"/>
            <lib dir="${velocity.dir}" includes="*.jar"/>
            <lib file="${urlrewrite.jar}"/>
        </war>
    </target>