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"Duplicate" deployment exception logging detracts from JBoss AS usability
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created by <a href="http://community.jboss.org/people/lincolnthree">Lincoln Baxter III</a> in <i>JBoss Microcontainer</i> - <a href="http://community.jboss.org/message/546092#546092">View the full discussion</a>
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<div class="jive-rendered-content"><p>When using JBoss AS (6 M{X} in this case) - deployment errors can be critical for debugging botched configurations in web-applications. In fact, looking through the stack trace the only way to find out what's wrong, and why your app isn't deploying.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>That's fine. The problem comes when the exception message is duplicated or even hidden by numerous exceptions that pile up in the log, effectively turning the next minute or so into a duck hunt, weeding through exceptions until you find the one line that you're really looking for.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I think JBoss AS/MC should be more selective when displaying exceptions.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>For example: <a class="jive-link-external-small" href="http://pastebin.com/NjjXLuiF">http://pastebin.com/NjjXLuiF</a> - In this case, I don't even want to see an exception. I've simply got a Servlet that can't be resolved to a class, and all really I care about is:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">
DEPLOYMENTS IN ERROR:  Deployment "vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/" is in error due to the following reason(s): java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@1e05df6d{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>It would be even nicer if I were told that I had a bad Servlet definition in web.xml, but instead, I get all of this... which isn't really helpful to an end-user. (Granted, in this case all of the exceptions actually contain the same  root cause, but in some cases that doesn't happen - I certainly don't want duplicate exceptions.)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'd like to open a JIRA for this. It's relatively low-hanging fruit that could help smoothe the developer experience.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">
11:56:14,884 INFO  [org.jboss.web.tomcat.service.deployers.TomcatDeployment] undeploy, ctxPath=/pretty-blog
11:56:17,425 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to PreReal: name=vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/ state=PostClassLoader mode=Manual requiredState=PreReal: org.jboss.deployers.spi.DeploymentException: java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@5b20a97e{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
    at org.jboss.resteasy.integration.deployers.ResteasyScannerDeployer.deployApplicationClass(ResteasyScannerDeployer.java:112)
    at org.jboss.resteasy.integration.deployers.ResteasyScannerDeployer.internalDeploy(ResteasyScannerDeployer.java:57)
    at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:55)
    at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1660)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1378)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1319)
    at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:378)
    at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2029)
    at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1050)
    at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1289)
    at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1213)
    at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1107)
    at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:918)
    at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:633)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:898)
    at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:677)
    at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:409)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:294)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:637)
Caused by: java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@5b20a97e{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
    at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:498)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.jboss.resteasy.integration.deployers.ResteasyScannerDeployer.deployApplicationClass(ResteasyScannerDeployer.java:108)
    ... 28 more
11:56:17,430 WARN  [org.jboss.system.server.profileservice.hotdeploy.HDScanner] Failed to process changes: org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):
*** DEPLOYMENTS IN ERROR: Name -> Error
vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/ -> org.jboss.deployers.spi.DeploymentException: java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@5b20a97e{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
DEPLOYMENTS IN ERROR:
  Deployment "vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/" is in error due to the following reason(s): java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@5b20a97e{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
    at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:1198)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:1144)
    at org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:848)
    at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.checkComplete(MainDeployerAdapter.java:128)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:416)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:294)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:637)
11:56:18,504 SEVERE [javax.enterprise.resource.webcontainer.jsf.config] Unable to access url jndi:/localhost/pretty-blog/WEB-INF/faces-config.xml.  Monitoring for this resource will no longer occur.
11:56:44,856 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to PreReal: name=vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/ state=PostClassLoader mode=Manual requiredState=PreReal: org.jboss.deployers.spi.DeploymentException: java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@1e05df6d{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
    at org.jboss.resteasy.integration.deployers.ResteasyScannerDeployer.deployApplicationClass(ResteasyScannerDeployer.java:112)
    at org.jboss.resteasy.integration.deployers.ResteasyScannerDeployer.internalDeploy(ResteasyScannerDeployer.java:57)
    at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:55)
    at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1660)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1378)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1319)
    at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:378)
    at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2029)
    at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1050)
    at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1289)
    at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1213)
    at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1107)
    at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:918)
    at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:633)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:898)
    at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:677)
    at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:409)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:294)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:637)
Caused by: java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@1e05df6d{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
    at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:498)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.jboss.resteasy.integration.deployers.ResteasyScannerDeployer.deployApplicationClass(ResteasyScannerDeployer.java:108)
    ... 28 more
11:56:44,861 WARN  [org.jboss.system.server.profileservice.hotdeploy.HDScanner] Failed to process changes: org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):
*** DEPLOYMENTS IN ERROR: Name -> Error
vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/ -> org.jboss.deployers.spi.DeploymentException: java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@1e05df6d{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
DEPLOYMENTS IN ERROR:
  Deployment "vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/" is in error due to the following reason(s): java.lang.ClassNotFoundException: com.sun.FooServlet from BaseClassLoader@1e05df6d{vfszip:/Users/lbaxter/dev/jboss-6/server/default/deploy/pretty-blog.war/}
    at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:1198)
    at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:1144)
    at org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:848)
    at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.checkComplete(MainDeployerAdapter.java:128)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:416)
    at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:294)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:637)
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></div>
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