Program: 41896
Project: 41896
Buggy source:
/** 
 * QueryIterable constructor taking in the individual parameters for creating a DocumentServiceRequest This constructor is used for partitioning scenarios when multiple DocumentServiceRequests need to be created
 */
@SuppressWarnings("String_Node_Str") protected QueryIterable(DocumentClient client,String databaseOrDocumentCollectionLink,SqlQuerySpec querySpec,FeedOptions options,Object partitionKey,ReadType readType,Class<T> classT){
  this.initialize(client,readType,classT);
  this.querySpec=querySpec;
  if (Utils.isDatabaseLink(databaseOrDocumentCollectionLink)) {
    PartitionResolver partitionResolver=this.client.getPartitionResolver(databaseOrDocumentCollectionLink);
    if (partitionResolver != null) {
      for (      String collectionLink : partitionResolver.resolveForRead(partitionKey)) {
        this.documentCollectionLinks.add(collectionLink);
      }
    }
 else {
      throw new IllegalArgumentException(DocumentClient.PartitionResolverErrorMessage);
    }
  }
 else {
    this.documentCollectionLinks.add(databaseOrDocumentCollectionLink);
  }
  if (this.documentCollectionLinks != null && this.documentCollectionLinks.size() > 0) {
    String path=Utils.joinPath(this.documentCollectionLinks.get(this.currentCollectionIndex),Paths.DOCUMENTS_PATH_SEGMENT);
    this.currentCollectionIndex++;
    this.requestHeaders=this.client.getFeedHeaders(options);
    this.request=DocumentServiceRequest.create(ResourceType.Document,path,this.querySpec,this.client.queryCompatibilityMode,this.requestHeaders);
    this.initializeContinuationToken();
  }
  this.reset();
}

Fixed version (ground truth):
/** 
 * Creates a new instance of the QueryIterable class. <p> QueryIterable constructor taking in the individual parameters for creating a DocumentServiceRequest This constructor is used for partitioning scenarios when multiple DocumentServiceRequests need to be created
 * @param client the document client
 * @param databaseOrDocumentCollectionLink the database or document collection link
 * @param querySpec the query spec
 * @param options the feed options
 * @param partitionKey the partition key
 * @param readType the read type
 * @param classT the class type
 */
@SuppressWarnings("String_Node_Str") protected QueryIterable(DocumentClient client,String databaseOrDocumentCollectionLink,SqlQuerySpec querySpec,FeedOptions options,Object partitionKey,ReadType readType,Class<T> classT){
  this.initialize(client,readType,classT);
  this.querySpec=querySpec;
  if (Utils.isDatabaseLink(databaseOrDocumentCollectionLink)) {
    PartitionResolver partitionResolver=this.client.getPartitionResolver(databaseOrDocumentCollectionLink);
    if (partitionResolver != null) {
      for (      String collectionLink : partitionResolver.resolveForRead(partitionKey)) {
        this.documentCollectionLinks.add(collectionLink);
      }
    }
 else {
      throw new IllegalArgumentException(DocumentClient.PartitionResolverErrorMessage);
    }
  }
 else {
    this.documentCollectionLinks.add(databaseOrDocumentCollectionLink);
  }
  if (this.documentCollectionLinks != null && this.documentCollectionLinks.size() > 0) {
    String path=Utils.joinPath(this.documentCollectionLinks.get(this.currentCollectionIndex),Paths.DOCUMENTS_PATH_SEGMENT);
    this.currentCollectionIndex++;
    this.requestHeaders=this.client.getFeedHeaders(options);
    this.request=DocumentServiceRequest.create(ResourceType.Document,path,this.querySpec,this.client.queryCompatibilityMode,this.requestHeaders);
    this.initializeContinuationToken();
  }
  this.reset();
}