Hi all,
I use Jetty as my embedded web server in my application.
And I have a function to restart the Jetty dynamically in my application.
I just use the org.eclipse.jetty.server.Server.start() to start a web server
and org.eclipse.jetty.server.Server.stop() to stop a web server.
The problem is I have DWR in my web application and when restart the Jetty,
DWR will throw an exception as below.
It seems the Jetty didn't unload all loaded classes or didn't stop running
threads when Jetty stopped. So that the restart will cause the problem but
the first start is ok.
2011/2/17 PM 05:18:59 org.directwebremoting.impl.DefaultServerContextBuilder
get
severe: Error initializing ServerContext because this is not a DWR thread
and there is more than one DWR servlet in the current classloader.
2011/2/17 PM 05:18:59 org.directwebremoting.impl.DefaultServerContextBuilder
get
severe: This probably means that either DWR has not been properly
initialized (in which case you should delay the current action until it has)
2011/2/17 PM 05:18:59 org.directwebremoting.impl.DefaultServerContextBuilder
get
severe: or that there is more than 1 DWR servlet is configured in this
classloader, in which case you should provide a ServletContext to the get()
yourself.
2011-02-17 17:18:59.450:WARN::/center/ppbe.json
java.lang.IllegalStateException: No singleton ServerContext see logs for
possible causes and solutions.
at
org.directwebremoting.impl.DefaultServerContextBuilder.get(DefaultServerCont
extBuilder.java:46)
at
org.directwebremoting.impl.DefaultServerContextBuilder.get(DefaultServerCont
extBuilder.java:29)
at org.directwebremoting.extend.Factory.get(Factory.java:60)
at
org.directwebremoting.ServerContextFactory.get(ServerContextFactory.java:35)
at
com.cyberpowersystems.ppbe.center.core.facility.FacilityUpdater.getScriptSes
sion(FacilityUpdater.java:293)
at
com.cyberpowersystems.ppbe.center.core.facility.FacilityUpdater.isScriptSess
ionViewSnapExist(FacilityUpdater.java:265)
at
com.cyberpowersystems.ppbe.center.core.jsonservice.handler.DevicePresentHand
ler.handle(DevicePresentHandler.java:29)
at
com.cyberpowersystems.ppbe.center.core.jsonservice.RequestProcessor.process(
RequestProcessor.java:73)
at
com.cyberpowersystems.ppbe.center.ui.web.jsonservice.JsonServiceServlet.doPo
st(JsonServiceServlet.java:66)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:527)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler
.java:1216)
at
org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176
)
at
org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at
org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.jav
a:92)
at
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter
.java:381)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler
.java:1187)
at
com.cyberpowersystems.ppbe.center.ui.web.processor.PathFilter.processUrlRequ
est(PathFilter.java:171)
at
com.cyberpowersystems.ppbe.center.ui.web.processor.PathFilter.doFilter(PathF
ilter.java:85)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler
.java:1187)
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:421)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119
)
at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:493)
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java
:225)
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java
:930)
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:358)
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:
183)
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:
866)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117
)
at
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHand
lerCollection.java:245)
at
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.
java:126)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:1
13)
at org.eclipse.jetty.server.Server.handle(Server.java:351)
at
org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:59
4)
at
org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnectio
n.java:1059)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:764)
at
org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:217)
at
org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:424)
at
org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketCon
nector.java:241)
at
org.eclipse.jetty.server.ssl.SslSocketConnector$SslConnectorEndPoint.run(Ssl
SocketConnector.java:645)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:4
36)
at java.lang.Thread.run(Unknown Source)
Any ideas?
Sincerely,
Micky
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