Java.io.StreamCorruptedException

Hi I'm currently working on a project which deals with objectStreams.
When a client connects to the server, the server creates a send thread and a receive thread to serve the client.As one can imagine there is an ObjectInputStream accepting objects from the client in the receive thread and an ObjectOutputStream in the send thread to send objects.
However in order to assure that the client has not disconnected there is one more ObjectOutputStream in the receive thread that send PING messages to the client. The addition of this stream causes StreamCorruptedException. When rewriting the code using DataStreams ,instead of ObjectStreams,it works perfectly.
I make sure that every ObjectOutputStream is flushed,i create them before the corresponding ObjectInputStreams and i access the sockets using synchronized (socket)when i attempt to get the input and ouput streams.
When I disable the ping function thus, not creating the ObjectOutputStream from the receive thread side, my application is working...
can anybody give me a tip?
It would be very much appreciated. Thanks in advance

can anybody give me a tip?Yes. Don't. Use the same ObjectOutputStream for both purposes, or use the DataOutputStream for the ping as you already discovered. Object streams have headers and state so you can't just add another one to the same stream.

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    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled
    Code)
    JNDI naming exception: Naming exception trying to connect to:
    t3://localhost:7501 as: system: beaadmin

    yes, that was the reason.
    thank you very much!
    "Dimitri Rakitine" <[email protected]> schrieb im Newsbeitrag
    news:[email protected]...
    That sounds like you use 1.2 on the client side - make sure that you use1.3.
    >
    In weblogic.developer.interest.ejb Nora Serinek <[email protected]>
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    Help needed!
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    at
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    atjava.io.ObjectInputStream.readObject(ObjectInputStream.java:353)
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    atjava.io.ObjectInputStream.inputObject(ObjectInputStream.java:978)
    atjava.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
    atjava.io.ObjectInputStream.readObject(ObjectInputStream.java:232)
    at
    weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectIn
    putStream.java:107)
    at
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    putStream.java:115)
    at
    weblogic.rjvm.ConnectionManager.readPeerInfo(ConnectionManager.java:686)
    at
    weblogic.rjvm.ConnectionManagerClient.handleIdentifyResponse(ConnectionManag
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    at
    weblogic.rjvm.ConnectionManager.dispatch(ConnectionManager.java:627)
    atweblogic.rjvm.t3.T3JVMConnection.dispatch(T3JVMConnection.java,
    Compiled Code)
    at
    weblogic.socket.JavaSocketMuxer.processSockets2(JavaSocketMuxer.java,
    Compiled Code)
    at
    weblogic.socket.JavaSocketMuxer.processSockets(JavaSocketMuxer.java,
    Compiled Code)
    at
    weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:24)
    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java,Compiled
    Code)
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    Compiled Code)
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    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java,Compiled
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    Dimitri

  • Issue with POF serialization - Failure to deserialize an Invocable object: java.io.StreamCorruptedException

    Am running into following exception even after following all guidelines to implement POF. The main objective is to perform Distributed Bulk cache loading.
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      at com.tangosol.io.pof.PofBufferReader.readAsObject(PofBufferReader.java:3312)
      at com.tangosol.io.pof.PofBufferReader.readObject(PofBufferReader.java:2604)
      at com.tangosol.io.pof.ConfigurablePofContext.deserialize(ConfigurablePofContext.java:371)
      at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.readObject(Service.CDB:1)
      at com.tangosol.coherence.component.net.Message.readObject(Message.CDB:1)
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      at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.deserializeMessage(Grid.CDB:19)
      at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:31)
      at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
      at java.lang.Thread.run(Thread.java:662)
    Following is the pof-config.xml
    <?xml version="1.0" encoding="UTF-8" ?>
    <pof-config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                xmlns="http://xmlns.oracle.com/coherence/coherence-pof-config"
                xsi:schemaLocation="http://xmlns.oracle.com/coherence/coherence-pof-config/1.1/coherence-pof-config.xsd">
      <user-type-list>
        <include>coherence-pof-config.xml</include>
        <user-type>
          <type-id>1001</type-id>
          <class-name>com.westgroup.coherence.bermuda.loader.DistributedLoaderAgent</class-name>
          <serializer>
            <class-name>com.tangosol.io.pof.PofAnnotationSerializer</class-name>     
            <init-params>
              <init-param>
                <param-type>int</param-type>
                <param-value>{type-id}</param-value>
              </init-param>
              <init-param>
                <param-type>java.lang.Class</param-type>
                <param-value>{class}</param-value>
              </init-param>
              <init-param>
                <param-type>boolean</param-type>
                <param-value>true</param-value>
              </init-param>
            </init-params>
          </serializer>
        </user-type>
         <user-type>
          <type-id>1002</type-id>
          <class-name>com.westgroup.coherence.bermuda.profile.lpa.LPACacheProfile</class-name>
          <serializer>
            <class-name>com.tangosol.io.pof.PofAnnotationSerializer</class-name>     
            <init-params>
              <init-param>
                <param-type>int</param-type>
                <param-value>{type-id}</param-value>
              </init-param>
              <init-param>
                <param-type>java.lang.Class</param-type>
                <param-value>{class}</param-value>
              </init-param>
              <init-param>
                <param-type>boolean</param-type>
                <param-value>true</param-value>
              </init-param>
            </init-params>
          </serializer>
        </user-type>
         <user-type>
          <type-id>1003</type-id>
          <class-name>com.westgroup.coherence.bermuda.profile.lpa.Address</class-name>
          <serializer>
            <class-name>com.tangosol.io.pof.PofAnnotationSerializer</class-name>     
            <init-params>
              <init-param>
                <param-type>int</param-type>
                <param-value>{type-id}</param-value>
              </init-param>
              <init-param>
                <param-type>java.lang.Class</param-type>
                <param-value>{class}</param-value>
              </init-param>
              <init-param>
                <param-type>boolean</param-type>
                <param-value>true</param-value>
              </init-param>
            </init-params>
          </serializer>
        </user-type>
         <user-type>
          <type-id>1004</type-id>
          <class-name>com.westgroup.coherence.bermuda.profile.lpa.Discipline</class-name>
          <serializer>
            <class-name>com.tangosol.io.pof.PofAnnotationSerializer</class-name>     
            <init-params>
              <init-param>
                <param-type>int</param-type>
                <param-value>{type-id}</param-value>
              </init-param>
              <init-param>
                <param-type>java.lang.Class</param-type>
                <param-value>{class}</param-value>
              </init-param>
              <init-param>
                <param-type>boolean</param-type>
                <param-value>true</param-value>
              </init-param>
            </init-params>
          </serializer>
        </user-type>
         <user-type>
          <type-id>1005</type-id>
          <class-name>com.westgroup.coherence.bermuda.profile.lpa.Employment</class-name>
          <serializer>
            <class-name>com.tangosol.io.pof.PofAnnotationSerializer</class-name>     
            <init-params>
              <init-param>
                <param-type>int</param-type>
                <param-value>{type-id}</param-value>
              </init-param>
              <init-param>
                <param-type>java.lang.Class</param-type>
                <param-value>{class}</param-value>
              </init-param>
              <init-param>
                <param-type>boolean</param-type>
                <param-value>true</param-value>
              </init-param>
            </init-params>
          </serializer>
        </user-type>
      </user-type-list>
      <allow-interfaces>true</allow-interfaces>
      <allow-subclasses>true</allow-subclasses>
    </pof-config>
    cache-config.xml
    <cache-config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns="http://xmlns.oracle.com/coherence/coherence-cache-config"
      xsi:schemaLocation="http://xmlns.oracle.com/coherence/coherence-cache-config http://xmlns.oracle.com/coherence/coherence-cache-config/1.1/coherence-cache-config.xsd">
       <defaults>
        <serializer>pof</serializer>
        </defaults>
      <caching-scheme-mapping>
      <cache-mapping>
      <cache-name>DistributedLPACache</cache-name>
      <scheme-name>LPANewCache</scheme-name>
      <init-params>
      <init-param>
      <param-name>back-size-limit</param-name>
      <param-value>250MB</param-value>
      </init-param>
      </init-params>
      </cache-mapping>
      </caching-scheme-mapping>
      <caching-schemes>
      <!-- Distributed caching scheme. -->
      <distributed-scheme>
      <scheme-name>LPANewCache</scheme-name>
      <service-name>HBaseLPACache</service-name>
      <serializer>
      <instance>
                 <class-name>com.tangosol.io.pof.ConfigurablePofContext</class-name>
                 <init-params>
                   <init-param>
                     <param-type>java.lang.String</param-type>
                     <param-value>pof-config.xml</param-value>
                   </init-param>
                 </init-params>
            </instance>
      </serializer>
      <backing-map-scheme>
      <read-write-backing-map-scheme>
      <internal-cache-scheme>
      <class-scheme>
      <class-name>com.tangosol.util.ObservableHashMap</class-name>
      </class-scheme>
      </internal-cache-scheme>
      <cachestore-scheme>
      <class-scheme>
      <class-name>com.westgroup.coherence.bermuda.profile.lpa.LPACacheProfile</class-name>
      </class-scheme>
      </cachestore-scheme>
      <read-only>false</read-only>
      <write-delay-seconds>0</write-delay-seconds>
      </read-write-backing-map-scheme>
      </backing-map-scheme>
      <autostart>true</autostart>
      </distributed-scheme>
      <invocation-scheme>
           <scheme-name>InvocationService</scheme-name>
           <service-name>InvocationService</service-name>
           <thread-count>5</thread-count>
           <autostart>true</autostart>
        </invocation-scheme>
      </caching-schemes>
    </cache-config>
    DistributedLoaderAgent (user type 1001)
    import java.io.IOException;
    import java.io.Serializable;
    import java.lang.annotation.Annotation;
    import org.apache.log4j.Logger;
    import com.tangosol.io.pof.PofReader;
    import com.tangosol.io.pof.PofWriter;
    import com.tangosol.io.pof.PortableObject;
    import com.tangosol.io.pof.annotation.Portable;
    import com.tangosol.io.pof.annotation.PortableProperty;
    import com.tangosol.net.AbstractInvocable;
    import com.tangosol.net.InvocationService;
    @Portable
    public class DistributedLoaderAgent extends AbstractInvocable implements PortableObject{
      private static final long serialVersionUID = 10L;
      private static Logger m_logger = Logger.getLogger(DistributedLoaderAgent.class);
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      public String partDumpFileName = null;
      public String getPartDumpFileName() {
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      public void setPartDumpFileName(String partDumpFileName) {
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      super();
      m_logger.debug("Configuring this loader ");
      public DistributedLoaderAgent(String partDumpFile){
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      m_logger.debug("Configuring this loader to load dump file "+ partDumpFile);
      partDumpFileName = partDumpFile;
      @Override
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      super.init(service);
      @Override
      public void run() {
      // TODO Auto-generated method stub
      try{
      m_logger.debug("Invoked DistributedLoaderAgent");
      MetadataTranslatorService service = new MetadataTranslatorService(false, "LPA");
      m_logger.debug("Invoking service.loadLPACache");
      service.loadLPACache(partDumpFileName);
      }catch(Exception e){
      m_logger.debug("Exception in DistributedLoaderAgent " + e.getMessage());
      @Override
      public void readExternal(PofReader arg0) throws IOException {
      // TODO Auto-generated method stub
      setPartDumpFileName(arg0.readString(0));
      @Override
      public void writeExternal(PofWriter arg0) throws IOException {
      // TODO Auto-generated method stub
      arg0.writeString(0, getPartDumpFileName());
    Please assist.

    OK I have two suggestions.
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  • UnmarshalException followed by java.io.StreamCorruptedException

    package Jdbcpgms;
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    import javax.sql.*;
    import javax.naming.*;
    import java.io.*;
    import java.util.*;
    import weblogic.jndi.*;
    * @author owner
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    javax.naming.CommunicationException [Root exception is java.rmi.UnmarshalExcepti
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    at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.ja
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    javax.naming.CommunicationException [Root exception is java.net.ConnectException
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    javax.naming.CommunicationException [Root exception is java.net.ConnectException
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    at javax.naming.InitialContext.init(InitialContext.java:219)
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    C:\java\j2sdk1.4.2\bin>java Jdbcpgms.DataSourceClient
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    Hi,
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    I am assuming that the ObjectOutputStream called flush() prior to attempting to read the file.
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    First, your singleton is not threadsafe, second because it's overly complicated. Simply eagerly initialize it.
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