Class not found - was channel definition question

Question

I am much closer.  Tomcat is putting some key messages in the console and I overlooked them.  It looks like I am closer than I thought.  The request looks like its getting received, but my service blows up on response due to I think two class not found issues.  But, I can't tell what classes are missing.
[Flex]Deserializing AMF/RTMP request
Version: 3  null
  2.0
  (Command method=null (0) trxId=2.0)
    null
    (Externalizable Object #0 'flex.data.messages.DataMessageExt')
      (Array #1)
        [0] = (Typed Object #2 'flex.data.messages.DataMessage')
          identity = (Object #3)
            partId = 81959
          operation = 11
          correlationId = "419F99AA-B649-9490-650D-88F3CAADBCB7"
          headers = (Object #4)
          messageId = "8AF6C660-9DE3-F155-6A91-88F3CAC5A4F0"
          timestamp = 0
          destination = "DocumentPart"
          timeToLive = 0
          body = (Typed Object #5 'com.hpdocs.ds.document.DocumentPart')
            documentId = 81960
            partId = 81959
            content = "Hello World"
          clientId = "05E549ED-455F-A9AF-EEDE-88F3CA7E4BF9"
"DocumentPart"
(Object #6)
        DSEndpoint = "hp_rtmp"
        DSId = "F65B351A-A60C-6F91-2932-44630DAED2B9"
(Byte Array #7, Length 16) ""
7
[Flex]Received command: TCCommand [ Cmd: 0, MethodName: null, TrxID: 2.0]
[Flex]Serializing AMF/RTMP response
Version: 3
  (Command method=_error (0) trxId=2.0)
    (Typed Object #0 'flex.messaging.messages.ErrorMessage')
      headers = (Object #1)
      rootCause = (Typed Object #2 'java.lang.NoClassDefFoundError')
        message = "javax/transaction/SystemException"
        localizedMessage = "javax/transaction/SystemException"
        cause = (Typed Object #3 'java.lang.ClassNotFoundException')
          message = "javax.transaction.SystemException"
          localizedMessage = "javax.transaction.SystemException"
          cause = null
          exception = null
      body = null
      correlationId = "419F99AA-B649-9490-650D-88F3CAADBCB7"
      faultDetail = null
      faultString = "There was an unhandled failure on the server. javax/transaction/SystemException"
      clientId = "F65B3649-620E-C827-50C4-6A1C78BC3712"
      timeToLive = 0.0
      destination = "DocumentPart"
      timestamp = 1.273607998612E12
      extendedData = null
      faultCode = "Server.Processing"
      messageId = "F65B3675-5409-795E-747F-B2F459749415"

Answer 1

it looks like your Tomcat is missing the JTA setting.
Tomcat
To use LiveCycle Data Services with Tomcat when not using the integrated Tomcat configuration, install support for the Java Transaction API (JTA). You might also have to install several other libraries depending on the features that you plan to use. Follow these steps after deploying the LiveCycle Data Services WAR files. These steps are not necessary for the integrated Tomcat installation.
Stop Tomcat.
To install support for JTA, a recommended implementation is the Java Open Transaction Manager (JOTM), which is a fully functional open source stand-alone transaction manager.
Download JOTM from http://jotm.objectweb.org.
Copy the JAR files from jotm-root/lib to [tomcat-root]/common/lib.
Create a context file for your web application and register JOTM using the Transaction element. For example, for the samples WAR create a tomcat-root/conf/Catalina/localhost/lcds-samples.xml file and add the following lines:CONTEXT antijarlocking="false" antiresourcelocking="false"   docbase="${catalina.home}/webapps/lcds-samples" path="/lcds-samples"   privileged="true">  <TRANSACTION factory="org.objectweb.jotm.UserTransactionFactory"   jotm.timeout="60"></TRANSACTION></CONTEXT> 
Note: If a context file exists for your web application, add the <TRANSACTION> element under the <CONTEXT> element.
Increase the maximum memory to at least 512 MB by specifying the maximum heap size for the JVM in the JAVA_OPTS variable: -Xmx512m
(Optional) To enable custom authentication, locate the Tomcat security resource libraries under install_root/resources/security/tomcat.
Place the flex-tomcat-common.jar and flex-tomcat-server.jar files in the tomcat/lib folder.
Add the following line to the context descriptor file for your web application:
<VALVE classname="flex.messaging.security.TomcatValve"></VALVE>
You can now perform authentication against the current Tomcat realm. Usually, the default configuration for authentication stores user information in conf/tomcat-users.xml. See the Tomcat documentation for more information on realms. See the LiveCycle Data Services documentation for more information on custom authentication.
You might also have to update the active <LOGIN-COMMAND> in /WEB-INF/flex/services-config.xml in each deployment of a LiveCycle Data Services WAR file. For Tomcat, ensure that the TomcatLoginCommand is active in the <SECURITY>section:<SECURITY><LOGIN-COMMAND server="Tomcat"></LOGIN-COMMAND>...</SECURITY>
(Optional) To use the JMSAdapter with the Message Service, install and configure a JMS provider (such as ActiveMQ or openJMS) for use with Tomcat.
Restart Tomcat.
original doc is located here
Hopefully this will help.