Program: 55978
Project: 55978
Buggy source:
/** 
 * Registers the given task with the byte buffered channel manager.
 * @param vertexID the ID of the task to be registered
 * @param environment the environment of the task
 */
public void register(final ExecutionVertexID vertexID,final Environment environment){
  final TaskContext taskContext=new TaskContext();
  for (int i=0; i < environment.getNumberOfOutputGates(); ++i) {
    final OutputGate<?> outputGate=environment.getOutputGate(i);
    final OutputGateContext outputGateContext=new OutputGateContext(taskContext,outputGate,this,this.fileBufferManager);
    for (int j=0; j < outputGate.getNumberOfOutputChannels(); ++j) {
      final AbstractOutputChannel<?> outputChannel=outputGate.getOutputChannel(j);
      if (outputChannel instanceof AbstractByteBufferedOutputChannel) {
        LOG.error("String_Node_Str" + outputChannel.getID() + "String_Node_Str"+ environment.getJobID()+ "String_Node_Str");
        continue;
      }
      final AbstractByteBufferedOutputChannel<?> bboc=(AbstractByteBufferedOutputChannel<?>)outputChannel;
      if (this.registeredChannels.containsKey(bboc.getID())) {
        LOG.error("String_Node_Str" + bboc.getID() + "String_Node_Str");
        continue;
      }
      LOG.info("String_Node_Str" + bboc.getID());
      final OutputChannelContext outputChannelContext=new OutputChannelContext(outputGateContext,bboc);
      this.registeredChannels.put(bboc.getID(),outputChannelContext);
    }
  }
  for (int i=0; i < environment.getNumberOfInputGates(); ++i) {
    final InputGate<?> inputGate=environment.getInputGate(i);
    final InputGateContext inputGateContext=new InputGateContext(taskContext);
    for (int j=0; j < inputGate.getNumberOfInputChannels(); ++j) {
      final AbstractInputChannel<?> inputChannel=inputGate.getInputChannel(j);
      if (inputChannel instanceof AbstractByteBufferedInputChannel) {
        LOG.error("String_Node_Str" + inputChannel.getID() + "String_Node_Str"+ environment.getJobID()+ "String_Node_Str");
        continue;
      }
      final AbstractByteBufferedInputChannel<?> bbic=(AbstractByteBufferedInputChannel<?>)inputChannel;
      if (this.registeredChannels.containsKey(bbic.getID())) {
        LOG.error("String_Node_Str" + bbic.getID() + "String_Node_Str");
        continue;
      }
      LOG.info("String_Node_Str" + bbic.getID());
      final InputChannelContext inputChannelContext=new InputChannelContext(inputGateContext,this,bbic);
      this.registeredChannels.put(bbic.getID(),inputChannelContext);
    }
  }
}

Fixed version (ground truth):
/** 
 * Registers the given task with the byte buffered channel manager.
 * @param vertexID the ID of the task to be registered
 * @param environment the environment of the task
 */
public void register(final ExecutionVertexID vertexID,final Environment environment){
  final TaskContext taskContext=new TaskContext();
  for (int i=0; i < environment.getNumberOfOutputGates(); ++i) {
    final OutputGate<?> outputGate=environment.getOutputGate(i);
    final OutputGateContext outputGateContext=new OutputGateContext(taskContext,outputGate,this,this.fileBufferManager);
    for (int j=0; j < outputGate.getNumberOfOutputChannels(); ++j) {
      final AbstractOutputChannel<?> outputChannel=outputGate.getOutputChannel(j);
      if (!(outputChannel instanceof AbstractByteBufferedOutputChannel)) {
        LOG.error("String_Node_Str" + outputChannel.getID() + "String_Node_Str"+ environment.getJobID()+ "String_Node_Str");
        continue;
      }
      final AbstractByteBufferedOutputChannel<?> bboc=(AbstractByteBufferedOutputChannel<?>)outputChannel;
      if (this.registeredChannels.containsKey(bboc.getID())) {
        LOG.error("String_Node_Str" + bboc.getID() + "String_Node_Str");
        continue;
      }
      LOG.info("String_Node_Str" + bboc.getID());
      final OutputChannelContext outputChannelContext=new OutputChannelContext(outputGateContext,bboc);
      this.registeredChannels.put(bboc.getID(),outputChannelContext);
    }
  }
  for (int i=0; i < environment.getNumberOfInputGates(); ++i) {
    final InputGate<?> inputGate=environment.getInputGate(i);
    final InputGateContext inputGateContext=new InputGateContext(taskContext);
    for (int j=0; j < inputGate.getNumberOfInputChannels(); ++j) {
      final AbstractInputChannel<?> inputChannel=inputGate.getInputChannel(j);
      if (!(inputChannel instanceof AbstractByteBufferedInputChannel)) {
        LOG.error("String_Node_Str" + inputChannel.getID() + "String_Node_Str"+ environment.getJobID()+ "String_Node_Str");
        continue;
      }
      final AbstractByteBufferedInputChannel<?> bbic=(AbstractByteBufferedInputChannel<?>)inputChannel;
      if (this.registeredChannels.containsKey(bbic.getID())) {
        LOG.error("String_Node_Str" + bbic.getID() + "String_Node_Str");
        continue;
      }
      LOG.info("String_Node_Str" + bbic.getID());
      final InputChannelContext inputChannelContext=new InputChannelContext(inputGateContext,this,bbic);
      this.registeredChannels.put(bbic.getID(),inputChannelContext);
    }
  }
}