Program: 56191
Project: 56191
Buggy source:
/** 
 * {@inheritDoc}
 */
@Override public void resourceAllocated(JobID jobID,AllocatedResource allocatedResource){
  if (allocatedResource == null) {
    LOG.error("String_Node_Str");
    return;
  }
  if (allocatedResource.getInstance() instanceof DummyInstance) {
    LOG.debug("String_Node_Str");
    return;
  }
  try {
    allocatedResource.getInstance().checkLibraryAvailability(jobID);
  }
 catch (  IOException ioe) {
    LOG.error("String_Node_Str" + StringUtils.stringifyException(ioe));
  }
synchronized (this.jobQueue) {
    final ExecutionGraph eg=getExecutionGraphByID(jobID);
    if (eg == null) {
      try {
        this.instanceManager.releaseAllocatedResource(jobID,null,allocatedResource);
      }
 catch (      InstanceException e) {
        LOG.error(e);
      }
      return;
    }
    AllocatedResource resourceToBeReplaced=null;
    ExecutionGraphIterator it=new ExecutionGraphIterator(eg,eg.getIndexOfCurrentExecutionStage(),true,true);
    while (it.hasNext()) {
      final ExecutionVertex vertex=it.next();
      if (vertex.getExecutionState() == ExecutionState.ASSIGNING && vertex.getAllocatedResource() != null) {
        if (vertex.getAllocatedResource().getInstance().getType().equals(allocatedResource.getInstance().getType())) {
          resourceToBeReplaced=vertex.getAllocatedResource();
          break;
        }
      }
    }
    if (resourceToBeReplaced == null) {
      LOG.warn("String_Node_Str" + allocatedResource.getInstance() + "String_Node_Str"+ eg.getJobID());
      try {
        this.instanceManager.releaseAllocatedResource(jobID,eg.getJobConfiguration(),allocatedResource);
      }
 catch (      InstanceException e) {
        LOG.error(e);
      }
      return;
    }
    it=new ExecutionGraphIterator(eg,true);
    while (it.hasNext()) {
      final ExecutionVertex vertex=it.next();
      if (vertex.getAllocatedResource().equals(resourceToBeReplaced)) {
        vertex.setAllocatedResource(allocatedResource);
        vertex.setExecutionState(ExecutionState.ASSIGNED);
      }
    }
  }
}

Fixed version (ground truth):
/** 
 * {@inheritDoc}
 */
@Override public void resourceAllocated(JobID jobID,AllocatedResource allocatedResource){
  if (allocatedResource == null) {
    LOG.error("String_Node_Str");
    return;
  }
  if (allocatedResource.getInstance() instanceof DummyInstance) {
    LOG.debug("String_Node_Str");
    return;
  }
  try {
    allocatedResource.getInstance().checkLibraryAvailability(jobID);
  }
 catch (  IOException ioe) {
    LOG.error("String_Node_Str" + StringUtils.stringifyException(ioe));
  }
synchronized (this.jobQueue) {
    final ExecutionGraph eg=getExecutionGraphByID(jobID);
    if (eg == null) {
      try {
        this.instanceManager.releaseAllocatedResource(jobID,null,allocatedResource);
      }
 catch (      InstanceException e) {
        LOG.error(e);
      }
      return;
    }
    AllocatedResource resourceToBeReplaced=null;
    ExecutionGraphIterator it=new ExecutionGraphIterator(eg,eg.getIndexOfCurrentExecutionStage(),true,true);
    while (it.hasNext()) {
      final ExecutionVertex vertex=it.next();
      if (vertex.getExecutionState() == ExecutionState.ASSIGNING && vertex.getAllocatedResource() != null) {
        if (vertex.getAllocatedResource().getInstanceType().equals(allocatedResource.getInstanceType())) {
          resourceToBeReplaced=vertex.getAllocatedResource();
          break;
        }
      }
    }
    if (resourceToBeReplaced == null) {
      LOG.warn("String_Node_Str" + allocatedResource.getInstance() + "String_Node_Str"+ eg.getJobID());
      try {
        this.instanceManager.releaseAllocatedResource(jobID,eg.getJobConfiguration(),allocatedResource);
      }
 catch (      InstanceException e) {
        LOG.error(e);
      }
      return;
    }
    it=new ExecutionGraphIterator(eg,true);
    while (it.hasNext()) {
      final ExecutionVertex vertex=it.next();
      if (vertex.getAllocatedResource().equals(resourceToBeReplaced)) {
        vertex.setAllocatedResource(allocatedResource);
        vertex.setExecutionState(ExecutionState.ASSIGNED);
      }
    }
  }
}