Exception in BuiltInDS SuperDevMode after .ds.xml change

[Blama]

Hi Isomorphic,

retesting a bug I noticed an issue I had before with BuiltInDS (now using v12.1p_2022-12-06, Eclipse 4.15, Win10, SuperDevMode with built in Webserver).

When I change a .ds.xml file (add an attribute to a field for example) it needs to be reparsed (OK). Sometimes this reparsing does not work with the error below, pointing to a different problem I assume. After stopping and restarting SuperDevMode everything is OK again. Also I have never seen this problem in my application, where I use Apache Tomcat + SuperDevMode.

This is the exception (please note that the stack trace also slightly differs, XML.parseXML(XML.java:295) vs XML.parseXML(XML.java:216)).

Before this log entry everything was OK, then I changed the file and the next request fails because of the parsing problem (the XML is OK of course).
Does this ClassCastException and error message mean anything to you?

Thank you & Best regards
Blama

=== 2023-01-31 16:04:37,722 [0-50] INFO RequestContext - URL: '/builtinds/sc/IDACall', User-Agent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0': Moz (Gecko) with Accept-Encoding header
=== 2023-01-31 16:04:37,819 [0-50] DEBUG XML - An exception was thrown while setting feature strings to prevent loading a DTD:
java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
    at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
    at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
    at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source)
    at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source)
    at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.setFeature(Unknown Source)
    at com.isomorphic.xml.XML.parseXML(XML.java:216)
    at com.isomorphic.xml.XML.parseRestrictedXML(XML.java:149)
    at com.isomorphic.xml.XML.toDSRecords(XML.java:497)
    at com.isomorphic.xml.XML.toDSRecords(XML.java:493)
    at com.isomorphic.rpc.RPCManager.parseRequest(RPCManager.java:2591)
    at com.isomorphic.rpc.RPCManager.<init>(RPCManager.java:435)
    at com.isomorphic.rpc.RPCManager.<init>(RPCManager.java:415)
    at com.isomorphic.servlet.IDACall.processRequest(IDACall.java:147)
    at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:119)
    at com.isomorphic.servlet.IDACall.doPost(IDACall.java:79)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:178)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
    at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:263)
    at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:95)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:499)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
    at java.lang.Thread.run(Unknown Source)
=== 2023-01-31 16:04:37,824 [0-50] ERROR IDACall - com.isomorphic.servlet.IDACall top-level exception
java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
    at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
    at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
    at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source)
    at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source)
    at com.isomorphic.xml.XML.parseXML(XML.java:295)
    at com.isomorphic.xml.XML.parseRestrictedXML(XML.java:149)
    at com.isomorphic.xml.XML.toDSRecords(XML.java:497)
    at com.isomorphic.xml.XML.toDSRecords(XML.java:493)
    at com.isomorphic.rpc.RPCManager.parseRequest(RPCManager.java:2591)
    at com.isomorphic.rpc.RPCManager.<init>(RPCManager.java:435)
    at com.isomorphic.rpc.RPCManager.<init>(RPCManager.java:415)
    at com.isomorphic.servlet.IDACall.processRequest(IDACall.java:147)
    at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:119)
    at com.isomorphic.servlet.IDACall.doPost(IDACall.java:79)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:178)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
    at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:263)
    at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:95)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:499)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
    at java.lang.Thread.run(Unknown Source)
[ERROR] 500 - POST /builtinds/sc/IDACall?isc_rpc=1&isc_v=v12.1p_2022-12-06&isc_xhr=1 (127.0.0.1) 4255 bytes
   Request headers
      Host: 127.0.0.1:8080
      User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
      Accept: */*
      Accept-Language: en-US,en;q=0.8,de-DE;q=0.5,de;q=0.3
      Accept-Encoding: gzip, deflate, br
      Content-Type: application/x-www-form-urlencoded; charset=UTF-8
      Content-Length: 1095
      Origin: http://127.0.0.1:8080
      Connection: keep-alive
      Referer: http://127.0.0.1:8080/BuiltInDS.html
      Cookie: isc_cState="ready"; JSESSIONID=l61jjy9kjf2y4ol9qge9nimr; GLog=%7B%0A%20%20%20%20trackRPC%3Afalse%0A%7D
      Sec-Fetch-Dest: empty
      Sec-Fetch-Mode: cors
      Sec-Fetch-Site: same-origin
   Response headers
      Date: Tue, 31 Jan 2023 15:04:37 GMT
      Content-Type: text/html; charset=ISO-8859-1

[Isomorphic]

See the section titled "Extra Step Required for GWT 2.8+" in the SmartGWT documentation here. Does that address your issue?

[Blama]

Hi Isomorphic,

yes, that seems to fix the problem.

Thanks a lot & Best regards
Blama