[2.1.0 Regression] Dev-Mode ClassLoader does not contain app classes

In play 2.1.0, our custom logback filter located in our app can’t be loaded in dev mode (throwing a ClassNotFoundException). In production mode, it can be loaded. In play 2.0, logback was able to load the filter in both modes.

This is the exception we get in dev mode (reduced context, originally about 50 lines of probably irrelevant stuff):

11:38:21,235 |-ERROR in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Could not create component [filter] of type [de.deviceident.log.MarkerFilter] java.lang.ClassNotFoundException: de.deviceident.log.MarkerFilter
        at java.lang.ClassNotFoundException: de.deviceident.log.MarkerFilter
        at      at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at      at java.security.AccessController.doPrivileged(Native Method)
        at      at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at      at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at      at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        at      at sbt.PlayCommands$$anonfun$53$$anonfun$55$$anon$2.loadClass(PlayCommands.scala:535)
        at      at ch.qos.logback.core.util.Loader.loadClass(Loader.java:124)

In dev-mode (via ‘sbt run’), the following ClassLoader is used (log message provoked by adding a non-fatal error in the application-logger.xml):

11:38:21,166 |-ERROR in ch.qos.logback.core.joran.util.PropertySetter@31eeeaed - The class "ch.qos.logback.core.filter.Filter" was loaded by 
11:38:21,167 |-ERROR in ch.qos.logback.core.joran.util.PropertySetter@31eeeaed - [SBT/Play shared ClassLoader, with: WrappedArray(file:/home/ole/projects/ll/di/lib/UASparser-0.3.1.jar, file:/home/ole/projects/ll/di/lib/jregex-1.2_01.jar, file:/home/ole/.sbt/boot/scala-2.10.0/lib/scala-library.jar, file:/home/ole/.ivy2/cache/play/play_2.10/jars/play_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/play/sbt-link/jars/sbt-link-2.1.0.jar, file:/home/ole/.ivy2/cache/org.javassist/javassist/jars/javassist-3.16.1-GA.jar, file:/home/ole/.ivy2/cache/play/play-exceptions/jars/play-exceptions-2.1.0.jar, file:/home/ole/.ivy2/cache/play/templates_2.10/jars/templates_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/com.github.scala-incubator.io/scala-io-file_2.10/jars/scala-io-file_2.10-0.4.2.jar, file:/home/ole/.ivy2/cache/com.github.scala-incubator.io/scala-io-core_2.10/jars/scala-io-core_2.10-0.4.2.jar, file:/home/ole/.ivy2/cache/com.jsuereth/scala-arm_2.10/jars/scala-arm_2.10-1.3.jar, file:/home/ole/.ivy2/cache/play/play-iteratees_2.10/jars/play-iteratees_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/org.scala-stm/scala-stm_2.10.0/jars/scala-stm_2.10.0-0.6.jar, file:/home/ole/.ivy2/cache/com.typesafe/config/bundles/config-1.0.0.jar, file:/home/ole/.ivy2/cache/io.netty/netty/bundles/netty-3.5.9.Final.jar, file:/home/ole/.ivy2/cache/org.slf4j/slf4j-api/jars/slf4j-api-1.6.6.jar, file:/home/ole/.ivy2/cache/org.slf4j/jul-to-slf4j/jars/jul-to-slf4j-1.6.6.jar, file:/home/ole/.ivy2/cache/org.slf4j/jcl-over-slf4j/jars/jcl-over-slf4j-1.6.6.jar, file:/home/ole/.ivy2/cache/ch.qos.logback/logback-core/jars/logback-core-1.0.7.jar, file:/home/ole/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-classic-1.0.7.jar, file:/home/ole/.ivy2/cache/com.typesafe.akka/akka-actor_2.10/bundles/akka-actor_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/com.typesafe.akka/akka-slf4j_2.10/bundles/akka-slf4j_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.1.jar, file:/home/ole/.ivy2/cache/org.joda/joda-convert/jars/joda-convert-1.2.jar, file:/home/ole/.ivy2/cache/org.apache.commons/commons-lang3/jars/commons-lang3-3.1.jar, file:/home/ole/.ivy2/cache/com.ning/async-http-client/jars/async-http-client-1.7.6.jar, file:/home/ole/.ivy2/cache/oauth.signpost/signpost-core/jars/signpost-core-1.2.1.2.jar, file:/home/ole/.ivy2/cache/commons-codec/commons-codec/jars/commons-codec-1.7.jar, file:/home/ole/.ivy2/cache/oauth.signpost/signpost-commonshttp4/jars/signpost-commonshttp4-1.2.1.2.jar, file:/home/ole/.ivy2/cache/commons-logging/commons-logging/jars/commons-logging-1.1.1.jar, file:/home/ole/.ivy2/cache/org.codehaus.jackson/jackson-core-asl/jars/jackson-core-asl-1.9.10.jar, file:/home/ole/.ivy2/cache/org.codehaus.jackson/jackson-mapper-asl/jars/jackson-mapper-asl-1.9.10.jar, file:/home/ole/.ivy2/cache/net.sf.ehcache/ehcache-core/jars/ehcache-core-2.6.0.jar, file:/home/ole/.ivy2/cache/javax.transaction/jta/jars/jta-1.1.jar, file:/home/ole/.ivy2/cache/org.scala-lang/scala-reflect/jars/scala-reflect-2.10.0.jar, file:/home/ole/.ivy2/cache/play/play-test_2.10/jars/play-test_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/org.hamcrest/hamcrest-core/jars/hamcrest-core-1.1.jar, file:/home/ole/.ivy2/cache/org.specs2/specs2_2.10/jars/specs2_2.10-1.13.jar, file:/home/ole/.ivy2/cache/org.specs2/scalaz-core_2.10/jars/scalaz-core_2.10-7.0.0.jar, file:/home/ole/.ivy2/cache/org.specs2/scalaz-concurrent_2.10/jars/scalaz-concurrent_2.10-7.0.0.jar, file:/home/ole/.ivy2/cache/org.specs2/scalaz-effect_2.10/jars/scalaz-effect_2.10-7.0.0.jar, file:/home/ole/.ivy2/cache/com.novocode/junit-interface/jars/junit-interface-0.9.jar, file:/home/ole/.ivy2/cache/junit/junit-dep/jars/junit-dep-4.8.2.jar, file:/home/ole/.ivy2/cache/org.scala-tools.testing/test-interface/jars/test-interface-0.5.jar, file:/home/ole/.ivy2/cache/org.fluentlenium/fluentlenium-festassert/jars/fluentlenium-festassert-0.7.3.jar, file:/home/ole/.ivy2/cache/org.fluentlenium/fluentlenium-core/jars/fluentlenium-core-0.7.3.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-java/jars/selenium-java-2.25.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-android-driver/jars/selenium-android-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-remote-driver/jars/selenium-remote-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/cglib/cglib-nodep/jars/cglib-nodep-2.1_3.jar, file:/home/ole/.ivy2/cache/org.json/json/jars/json-20080701.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-api/jars/selenium-api-2.25.0.jar, file:/home/ole/.ivy2/cache/com.google.guava/guava/jars/guava-12.0.jar, file:/home/ole/.ivy2/cache/com.google.code.findbugs/jsr305/jars/jsr305-1.3.9.jar, file:/home/ole/.ivy2/cache/org.apache.httpcomponents/httpclient/jars/httpclient-4.1.2.jar, file:/home/ole/.ivy2/cache/org.apache.httpcomponents/httpcore/jars/httpcore-4.1.3.jar, file:/home/ole/.ivy2/cache/org.apache.commons/commons-exec/jars/commons-exec-1.1.jar, file:/home/ole/.ivy2/cache/net.java.dev.jna/jna/jars/jna-3.4.0.jar, file:/home/ole/.ivy2/cache/net.java.dev.jna/platform/jars/platform-3.4.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-chrome-driver/jars/selenium-chrome-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-htmlunit-driver/jars/selenium-htmlunit-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/net.sourceforge.htmlunit/htmlunit/jars/htmlunit-2.9.jar, file:/home/ole/.ivy2/cache/xalan/xalan/jars/xalan-2.7.1.jar, file:/home/ole/.ivy2/cache/xalan/serializer/jars/serializer-2.7.1.jar, file:/home/ole/.ivy2/cache/xml-apis/xml-apis/jars/xml-apis-1.3.04.jar, file:/home/ole/.ivy2/cache/commons-collections/commons-collections/jars/commons-collections-3.2.1.jar, file:/home/ole/.ivy2/cache/commons-lang/commons-lang/jars/commons-lang-2.6.jar, file:/home/ole/.ivy2/cache/org.apache.httpcomponents/httpmime/jars/httpmime-4.1.2.jar, file:/home/ole/.ivy2/cache/net.sourceforge.htmlunit/htmlunit-core-js/jars/htmlunit-core-js-2.9.jar, file:/home/ole/.ivy2/cache/xerces/xercesImpl/jars/xercesImpl-2.9.1.jar, file:/home/ole/.ivy2/cache/net.sourceforge.nekohtml/nekohtml/jars/nekohtml-1.9.15.jar, file:/home/ole/.ivy2/cache/net.sourceforge.cssparser/cssparser/jars/cssparser-0.9.5.jar, file:/home/ole/.ivy2/cache/org.w3c.css/sac/jars/sac-1.3.jar, file:/home/ole/.ivy2/cache/commons-io/commons-io/jars/commons-io-2.0.1.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-firefox-driver/jars/selenium-firefox-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-ie-driver/jars/selenium-ie-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-iphone-driver/jars/selenium-iphone-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-safari-driver/jars/selenium-safari-driver-2.25.0.jar, file:/home/ole/.ivy2/cache/org.webbitserver/webbit/jars/webbit-0.4.6.jar, file:/home/ole/.ivy2/cache/org.seleniumhq.selenium/selenium-support/jars/selenium-support-2.25.0.jar, file:/home/ole/.ivy2/cache/org.easytesting/fest-assert/jars/fest-assert-1.4.jar, file:/home/ole/.ivy2/cache/org.easytesting/fest-util/jars/fest-util-1.1.6.jar, file:/home/ole/.ivy2/cache/org.mongodb/casbah-commons_2.10/jars/casbah-commons_2.10-2.5.0.jar, file:/home/ole/.ivy2/cache/com.github.nscala-time/nscala-time_2.10/jars/nscala-time_2.10-0.2.0.jar, file:/home/ole/.ivy2/cache/org.mongodb/mongo-java-driver/jars/mongo-java-driver-2.10.1.jar, file:/home/ole/.ivy2/cache/org.mongodb/casbah-core_2.10/jars/casbah-core_2.10-2.5.0.jar, file:/home/ole/.ivy2/cache/org.mongodb/casbah-query_2.10/jars/casbah-query_2.10-2.5.0.jar, file:/home/ole/.ivy2/cache/org.mongodb/casbah-gridfs_2.10/jars/casbah-gridfs_2.10-2.5.0.jar, file:/home/ole/.ivy2/cache/net.sf.opencsv/opencsv/jars/opencsv-2.1.jar, file:/home/ole/.ivy2/cache/com.typesafe.play.plugins/play-statsd_2.10/jars/play-statsd_2.10-2.1.0.jar, file:/home/ole/.ivy2/cache/com.github.scopt/scopt_2.10/jars/scopt_2.10-2.1.0.jar), using parent: Common ClassLoader: ] whereas object of type

as you can see, the target/scala-2.10/classes dir is not on the classpath.

In prod-mode (via ‘sbt start’), the following ClassLoader is used:

11:14:49,241 |-ERROR in ch.qos.logback.core.joran.util.PropertySetter@4f2d26d2 - The class "ch.qos.logback.core.filter.Filter" was loaded by 
11:14:49,241 |-ERROR in ch.qos.logback.core.joran.util.PropertySetter@4f2d26d2 - [sun.misc.Launcher$AppClassLoader@3326b249] whereas object of type 
11:14:49,241 |-ERROR in ch.qos.logback.core.joran.util.PropertySetter@4f2d26d2 - "ch.qos.logback.classic.turbo.MarkerFilter" was loaded by [sun.misc.Launcher$AppClassLoader@3326b249].

and the filter loads fine and does its job.

This is an example of how we define the filter in our application-logger.xml:

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <filter class="de.di.log.MarkerFilter">
      <Marker>PERFORMANCE</Marker>
      <OnMatch>DENY</OnMatch>
    </filter>
    <encoder>
      <pattern>%date %coloredLevel %marker %logger\n%message%n%xException{5}\n</pattern>
    </encoder>
  </appender>

We have a couple of these filters in different appenders.

More info here: http://play.lighthouseapp.com/projects/82401/tickets/1023-210-Regression-Dev-Mode-ClassLoader-does-not-contain-app-classes @gissues:{“order”:94.87179487179486,“status”:“backlog”}

[ghost]

@jroper , you’re so helpful 😉

I wouldn’t ask it here if I could find the solution somewhere else; on the stackfoverflow this question was already answered (see http://stackoverflow.com/questions/20210574/play-fails-to-load-custom-log-back-appender), but I don’t like the idea to compile logback stuff and manually put it to jar file at /lib directory. Shouldn’t playframework do our lifes easier?

Another related question in the mailing (see https://groups.google.com/forum/#!topic/play-framework/MgLHlBOldeE) has no answer.

So, sorry me, but in this case I have no other place to ask play-devs on how to make things right except here. We’ll be very grateful if you can confirm that the suggested solution at stackoverflow is the only valid or enlighten us with proper way to extend logback in playframework.

Thanks.

[jroper]

@ssokolenko The mailing list and stack overflow are good places to ask questions, not the issue tracker.