Github user revans2 commented on a diff in the pull request:

    https://github.com/apache/storm/pull/1787#discussion_r88930878
  
    --- Diff: 
external/storm-hdfs/src/main/java/org/apache/storm/hdfs/trident/HdfsState.java 
---
    @@ -500,6 +500,7 @@ private void updateIndex(long txId) {
                 bw.write(txnRecord.toString());
                 bw.newLine();
                 bw.flush();
    +            out.close();       // Closing the output stream in finally 
block causes FileNotFoundException in Azure Data Lake Store file system (adl://)
    --- End diff --
    
    Why not just wrap the output stream in a try block instead?
    
    ```
    Path tmpPath = tmpFilePath(indexFilePath.toString());
    TxnRecord txnRecord = new TxnRecord(txId, options.currentFile.toString(), 
this.options.getCurrentOffset());
    try (FSDataOutputStream out = this.options.fs.create(tmpPath, true);
           BufferedWriter bw = new BufferedWriter(new 
OutputStreamWriter(out));) {
        bw.write(txnRecord.toString());
        bw.newLine();
        bw.flush();
    }
    ```
    
    Then you don't need to worry about the close happening before the delete, 
even in error cases.


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