metaSave API is using Printwriter, It will eat all the IOExceptions. --------------------------------------------------------------------
Key: HDFS-2364 URL: https://issues.apache.org/jira/browse/HDFS-2364 Project: Hadoop HDFS Issue Type: Sub-task Components: name-node Reporter: Uma Maheswara Rao G Assignee: Uma Maheswara Rao G It is important to note that PrintStream and PrintWriter do not throw IOExceptions! IOException is a non-Runtime exception, which means that your code must catch them or declare it can throw them. The creators of Java realized that System.out and System.err would be very heavily used, and did not want to force inclusion of exception handling every time you wanted to write System.out.println(4). Therefore, PrintStream and PrintWriter catch their own exceptions and set an error flag. If you are using one of these classes for real output in your program (not merely using System.out.println()) you should call checkError() to see if an error has occurred. Because of this behavior, PrintStream and PrintWriter are not well suited for use other than System.out and System.err! Ref: http://www.cs.usfca.edu/~parrt/doc/java/JavaIO-notes.pdf -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira