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From Sergey Beryozkin <sberyoz...@gmail.com>
Subject Re: [jira] Commented: (CXF-2741) JAXB hang on JBoss 5.1.0
Date Fri, 02 Apr 2010 14:55:20 GMT
Hi Jeffrey

thanks for resolving this issue, it's been a tricky one :-). It would be
interesting to know which JVM parameter is 'to blame'...

cheers, Sergey

On Fri, Apr 2, 2010 at 3:12 PM, Jeffrey Poore (JIRA) <jira@apache.org>wrote:

>
>    [
> https://issues.apache.org/jira/browse/CXF-2741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852827#action_12852827]
>
> Jeffrey Poore commented on CXF-2741:
> ------------------------------------
>
> It appears that this is some kind of subtle JVM bug. I took a grass roots
> JBoss and put the war on it containing a minimal hello world service and it
> runs fine without hanging. Then put our normal war on it, still runs fine.
> We have some JNDI's that we add and some database connections, and it still
> worked after adding those. Then I added in the extra JVM parameters we pass
> in, and it hangs. I'm working on figuring out which one it is, but this is
> not a CXF issue, so I'm resolving.
>
> Thanks for your help gentlemen.
>
> > JAXB hang on JBoss 5.1.0
> > ------------------------
> >
> >                 Key: CXF-2741
> >                 URL: https://issues.apache.org/jira/browse/CXF-2741
> >             Project: CXF
> >          Issue Type: Bug
> >          Components: JAXB Databinding
> >    Affects Versions: 2.2.6
> >         Environment: JBoss 5.1.0.GA, Spring 2.5.6,
> javax.ws.rs.jsr311-api 1.1
> >            Reporter: Jeffrey Poore
> >
> > We have been using CXF RESTFul services for a long time on jboss-4.2.3
> with no issues. When we switched to JBoss 5.1.0.GA, things worked fine at
> first, but we noticed that after a short period of uptime, requests began to
> hang and time out. Debugging this issue, we tracked it to the synchronized
> block in AbstractJAXBProvider.java:
> > {code}
> > JAXBElementProvider(AbstractJAXBProvider).getPackageContext(Class<?>)
> line: 377
> > JAXBElementProvider(AbstractJAXBProvider).getJAXBContext(Class<?>, Type)
> line: 354
> > JAXBElementProvider(AbstractJAXBProvider).createMarshaller(Object,
> Class<?>, Type, String) line: 453
> > JAXBElementProvider.marshal(Object, Class<?>, Type, String, OutputStream,
> MediaType) line: 296
> > JAXBElementProvider.writeTo(Object, Class<?>, Type, Annotation[],
> MediaType, MultivaluedMap<String,Object>, OutputStream) line: 219
> > JAXRSOutInterceptor.serializeMessage(Message, Response,
> OperationResourceInfo, boolean) line: 241
> > JAXRSOutInterceptor.processResponse(Message) line: 138
> > JAXRSOutInterceptor.handleMessage(Message) line: 77
> > PhaseInterceptorChain.doIntercept(Message) line: 243
> > OutgoingChainInterceptor.handleMessage(Message) line: 76
> > PhaseInterceptorChain.doIntercept(Message) line: 243
> > ChainInitiationObserver.onMessage(Message) line: 109
> > ServletDestination.invoke(ServletConfig, ServletContext,
> HttpServletRequest, HttpServletResponse) line: 98
> > ServletController.invokeDestination(HttpServletRequest,
> HttpServletResponse, ServletDestination) line: 406
> > ServletController.invoke(HttpServletRequest, HttpServletResponse) line:
> 139
> > CXFServlet(AbstractCXFServlet).invoke(HttpServletRequest,
> HttpServletResponse) line: 142
> > CXFServlet(AbstractHTTPServlet).handleRequest(HttpServletRequest,
> HttpServletResponse) line: 179
> > CXFServlet(AbstractHTTPServlet).doGet(HttpServletRequest,
> HttpServletResponse) line: 108
> > CXFServlet(HttpServlet).service(HttpServletRequest, HttpServletResponse)
> line: 617
> > CXFServlet(AbstractHTTPServlet).service(ServletRequest, ServletResponse)
> line: 159
> > ApplicationFilterChain.internalDoFilter(ServletRequest, ServletResponse)
> line: 290
> > ApplicationFilterChain.doFilter(ServletRequest, ServletResponse) line:
> 206
> > ReplyHeaderFilter.doFilter(ServletRequest, ServletResponse, FilterChain)
> line: 96
> > ApplicationFilterChain.internalDoFilter(ServletRequest, ServletResponse)
> line: 235
> > ApplicationFilterChain.doFilter(ServletRequest, ServletResponse) line:
> 206
> > StandardWrapperValve.invoke(Request, Response) line: 235
> > StandardContextValve.invoke(Request, Response) line: 191
> > SecurityAssociationValve.invoke(Request, Response) line: 190
> > JaccContextValve.invoke(Request, Response) line: 92
> > SecurityContextEstablishmentValve.process(Request, Response, HttpEvent)
> line: 126
> > SecurityContextEstablishmentValve.invoke(Request, Response) line: 70
> > StandardHostValve.invoke(Request, Response) line: 127
> > ErrorReportValve.invoke(Request, Response) line: 102
> > CachedConnectionValve.invoke(Request, Response) line: 158
> > StandardEngineValve.invoke(Request, Response) line: 109
> > CoyoteAdapter.service(Request, Response) line: 330
> > Http11Processor.process(Socket) line: 829
> > Http11Protocol$Http11ConnectionHandler.process(Socket) line: 598
> > JIoEndpoint$Worker.run() line: 447
> > Thread.run() line: 619
> > {code}
> > Specifically, this method:
> > {code}
> > public JAXBContext getPackageContext(Class<?> type) {
> >         if (type == null || type == JAXBElement.class) {
> >             return null;
> >         }
> >         synchronized (packageContexts) {
> >             String packageName = PackageUtils.getPackageName(type);
> >             JAXBContext context = packageContexts.get(packageName);
> >             if (context == null) {
> >                 try {
> >                     context = JAXBContext.newInstance(packageName,
> type.getClassLoader(), cProperties);
> >                     packageContexts.put(packageName, context);
> >                 } catch (JAXBException ex) {
> >                     LOG.fine("Error creating a JAXBContext using
> ObjectFactory : "
> >                                 + ex.getMessage());
> >                     return null;
> >                 }
> >             }
> >             return context;
> >         }
> >     }
> > {code}
> > It appears that something is holding on to the synchronized lock on
> packageContexts and thus calls just block. Any help on this would be
> appreciated.
> > We are just trying to call a simple CXF service that uses JSR-311
> annotated methods and uses JAXB as the data binding. The class and method
> being called look like this:
> > {code}
> > @Path("/LDAP/")
> > public class LdapServicesImpl implements LdapServices {
> >     @GET
> >     @Path("/lookup/")
> >     @Produces("text/xml")
> >     @Override
> >     public SearchResult lookupUser(@Context UriInfo ui) {
> >         String userid = ui.getQueryParameters().getFirst("uid");
> >         SearchResult result = getLDAPInfo(userid);
> >         ...
> >         return result;
> > }
> > {code}
> > SearchResult is our JAXB annotated class:
> > {code}
> > @XmlAccessorType(XmlAccessType.FIELD)
> > @XmlType(name = "SearchResult", namespace = "urn:ldap", propOrder = {
> >     "ldapUsers",
> >     "error"
> > })
> > @XmlRootElement(name = "searchResult", namespace = "urn:ldap")
> > public class SearchResult
> >     implements Serializable
> > {
> >     private final static long serialVersionUID = 987654321L;
> >     @XmlElement(namespace = "urn:ldap")
> >     protected LdapUsers ldapUsers;
> >     @XmlElement(namespace = "urn:ldap")
> >     protected String error;
> >     ... getters and setters ...
> > }
> > LdapUsers:
> > @XmlAccessorType(XmlAccessType.FIELD)
> > @XmlType(name = "LdapUsers", namespace = "urn:ldap", propOrder = {
> >     "ldapUsers"
> > })
> > public class LdapUsers
> >     implements Serializable
> > {
> >     private final static long serialVersionUID = 987654321L;
> >     @XmlElement(name = "ldapUser", namespace = "urn:ldap")
> >     protected List<LdapUser> ldapUsers;
> >     ... getters and setters ...
> > }
> > LdapUser:
> > @XmlAccessorType(XmlAccessType.FIELD)
> > @XmlType(name = "LdapUser", namespace = "urn:ldap", propOrder = {
> >     "id",
> >     "fullName",
> >     "firstName",
> >     "middleName",
> >     "lastName",
> >     "address",
> >     "city",
> >     "state",
> >     "zip",
> >     "entityCode",
> >     "telephone",
> >     "title",
> >     "dn",
> >     "mail",
> >     "emsrowid",
> >     "community",
> >     "objectClasses",
> >     "groups"
> > })
> > public class LdapUser
> >     implements Serializable
> > {
> >     private final static long serialVersionUID = 987654321L;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String id;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String fullName;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String firstName;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String middleName;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String lastName;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String address;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String city;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String state;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String zip;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String entityCode;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String telephone;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String title;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String dn;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String mail;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String emsrowid;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected String community;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected ObjectClasses objectClasses;
> >     @XmlElement(namespace = "urn:ldap", required = true)
> >     protected Groups groups;
> >     ... getters and setters ...
> > }
> > {code}
>
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