hi all,

i was running the sample/Mail-shell and i got the following error:

[WARN] Error deploying web application directory ROOT
java.lang.NoSuchMethodError: javax.servlet.ServletContext.setAttribute
(Ljava/lang/String;Ljava/lang/Object;)V
        at
com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer.publishAttributeToWebApp
(EmbeddedTomcatServer.java:400)

I did a search for NoSuchMethodError and suspect that the classpath
has problem.

but when i do echo CLASSPATH, it is empty.

can it still be a classpath problem? please advise. The full error
message is below:

[WARN] Error deploying web application directory ROOT
java.lang.NoSuchMethodError: javax.servlet.ServletContext.setAttribute
(Ljava/lang/String;Ljava/lang/Object;)V
        at
com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer.publishAttributeToWebApp
(EmbeddedTomcatServer.java:400)
        at
com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer.publishShellLoggerAttribute
(EmbeddedTomcatServer.java:410)
        at com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer.access$000
(EmbeddedTomcatServer.java:54)
        at com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer
$1.containerEvent(EmbeddedTomcatServer.java:224)
        at org.apache.catalina.core.ContainerBase.fireContainerEvent
(ContainerBase.java:1358)
        at org.apache.catalina.core.StandardHostDeployer.install
(StandardHostDeployer.java:276)
        at org.apache.catalina.core.StandardHost.install(StandardHost.java:
832)
        at org.apache.catalina.startup.HostConfig.deployDirectories
(HostConfig.java:701)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:
432)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent
(HostConfig.java:349)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent
(LifecycleSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:
1091)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:
1083)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:
478)
        at org.apache.catalina.startup.Embedded.start(Embedded.java:846)
        at com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer.<init>
(EmbeddedTomcatServer.java:244)
        at com.google.gwt.dev.shell.tomcat.EmbeddedTomcatServer.start
(EmbeddedTomcatServer.java:69)
        at com.google.gwt.dev.GWTShell.startUp(GWTShell.java:778)
        at com.google.gwt.dev.GWTShell.run(GWTShell.java:582)
        at com.google.gwt.dev.GWTShell.main(GWTShell.java:357)
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