IssueTracker

I am using Logback in my application (http://log-preview.appspot.com/), and it (Logback) fails to start with the exception in the end. The application runs normally, but without logback working.

The problem occurs only on GAE. On the development environment, logback initialises and works as expected.

I am using SDK v.1.8.0, Logback 1.0.13 behind SLF4J 1.7.5 on my Mac.

You can reproduce the problem by deploying the war file at: http://drive.google.com/uc?export=download&id=0B4SU1rHLJ4FybFY1WC01Nlk4ZkU


2013-06-06 23:32:38.445
[s~log-preview/1.367904391155270461].<stderr>: Failed to instantiate [ch.qos.logback.classic.LoggerContext]

W 2013-06-06 23:32:38.447
[s~log-preview/1.367904391155270461].<stderr>: Reported exception:

W 2013-06-06 23:32:38.925
Error for /logback
java.lang.NoClassDefFoundError: Could not initialize class ch.qos.logback.core.util.Loader
        at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(OptionHelper.java:34)
        at ch.qos.logback.core.pattern.parser.Compiler.createConverter(Compiler.java:107)
        at ch.qos.logback.core.pattern.parser.Compiler.compile(Compiler.java:64)
        at ch.qos.logback.core.pattern.parser.Parser.compile(Parser.java:91)
        at ch.qos.logback.core.pattern.PatternLayoutBase.start(PatternLayoutBase.java:86)
        at ch.qos.logback.classic.encoder.PatternLayoutEncoder.start(PatternLayoutEncoder.java:28)
        at com.markos.logpreview.LogbackServlet.createAppender(LogbackServlet.java:29)
        at com.markos.logpreview.LogbackServlet.createAppender(LogbackServlet.java:1)
        at com.markos.logpreview.BasePreviewServlet.doGet(BasePreviewServlet.java:30)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
        at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:57)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
        at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
        at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439)
        at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:480)
        at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:487)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:774)
        at com.google.tracing.TraceContext$DoInTraceContext.runInContext(TraceContext.java:751)
        at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:342)
        at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:334)
        at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:484)
        at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
        at java.lang.Thread.run(Thread.java:722)
C 2013-06-06 23:32:38.938
Uncaught exception from servlet
java.lang.NoClassDefFoundError: Could not initialize class ch.qos.logback.core.util.Loader
        at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(OptionHelper.java:34)
        at ch.qos.logback.core.pattern.parser.Compiler.createConverter(Compiler.java:107)
        at ch.qos.logback.core.pattern.parser.Compiler.compile(Compiler.java:64)
        at ch.qos.logback.core.pattern.parser.Parser.compile(Parser.java:91)
        at ch.qos.logback.core.pattern.PatternLayoutBase.start(PatternLayoutBase.java:86)
        at ch.qos.logback.classic.encoder.PatternLayoutEncoder.start(PatternLayoutEncoder.java:28)
        at com.markos.logpreview.LogbackServlet.createAppender(LogbackServlet.java:29)
        at com.markos.logpreview.LogbackServlet.createAppender(LogbackServlet.java:1)
        at com.markos.logpreview.BasePreviewServlet.doGet(BasePreviewServlet.java:30)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
        at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:57)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
        at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
        at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439)
        at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:480)
        at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:487)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:774)
        at com.google.tracing.TraceContext$DoInTraceContext.runInContext(TraceContext.java:751)
        at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:342)
        at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:334)
        at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:484)
        at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
        at java.lang.Thread.run(Thread.java:722)