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6 Replies Latest reply: Mar 19, 2007 6:58 AM by greybird RSS

bug report: NullPointerException on shutdown, v3.2.13

555408 Newbie
Currently Being Moderated
Hi all,

When running BDB-JavaEdition v3.2.13 with Sun Jdk 1.6.0, if trace is enabled at finest level, when the environment closes, the following exception occurs:
FINE: Env . daemons shutdown
Exception in thread "main" java.lang.NullPointerException
     at com.sleepycat.je.log.LogManager.log(LogManager.java:311)
     at com.sleepycat.je.log.LogManager.log(LogManager.java:181)
     at com.sleepycat.je.log.TraceLogHandler.publish(TraceLogHandler.java:41)
     at java.util.logging.Logger.log(Logger.java:472)
     at java.util.logging.Logger.doLog(Logger.java:494)
     at java.util.logging.Logger.log(Logger.java:517)
     at com.sleepycat.je.utilint.Tracer.trace(Tracer.java:71)
     at com.sleepycat.je.dbi.EnvironmentImpl.doClose(EnvironmentImpl.java:967)
     at com.sleepycat.je.dbi.EnvironmentImpl.close(EnvironmentImpl.java:895)
     at com.sleepycat.je.Environment.close(Environment.java:319)
This happens because in com.sleepycat.je.dbi.EnvironmentImpl, the call shutdownDaemons() - line 960 will close the checkpointer and the call Tracer.trace(Level.FINE, this,...) - line 967 will try to use a null checkpointer.

Regards,
Mircea
  • 1. Re: bug report: NullPointerException on shutdown, v3.2.13
    Charles Lamb Pro
    Currently Being Moderated
    Hi Mircea,

    It's funny that you should report this -- I just ran into this the other day and it is fixed in our mainline sources. Do you need a workaround for this? If so, I'll post the diffs. The workaround is to just remove that trace call in doClose() and recompile JE.

    Thanks.

    Charles Lamb
  • 2. Re: bug report: NullPointerException on shutdown, v3.2.13
    555408 Newbie
    Currently Being Moderated
    Hi Charles,

    Just wanted to let you know about this for the upcoming releases. The workaround is straightforward :)

    Mircea
  • 3. Re: bug report: NullPointerException on shutdown, v3.2.13
    566845 Newbie
    Currently Being Moderated
    Guys,

    I observe this with loggin level set to java.util.logging.Level.FINER. Could you tell me if the fix is available in any of the latest builds?

    Kunal
  • 4. Re: bug report: NullPointerException on shutdown, v3.2.13
    Linda Lee Journeyer
    Currently Being Moderated
    Kunal,

    The fix is checked into the next patch release, but not in any public release yet. In the meantime, here's a diff which shows how we moved the tracing call to the point before we shut down the daemon threads. You could edit your src/com/sleepycat/je/dbi/EnvironmentImpl.java file and recompile the library with "ant jar".
    $ cvs diff -wc src/com/sleepycat/je/dbi/EnvironmentImpl.java
    Index: src/com/sleepycat/je/dbi/EnvironmentImpl.java
    ===================================================================
    RCS file: /a/CVSROOT/je/src/com/sleepycat/je/dbi/EnvironmentImpl.java,v
    retrieving revision 1.255
    diff -w -c -r1.255 EnvironmentImpl.java
    *** src/com/sleepycat/je/dbi/EnvironmentImpl.java       4 Dec 2006 18:47:41 -000
    0       1.255
    --- src/com/sleepycat/je/dbi/EnvironmentImpl.java       14 Mar 2007 02:51:33 -00
    00
    ***************
    *** 956,961 ****
    --- 956,964 ----
                      }
                  }

    +             /* Flush log. */
    +             Tracer.trace(Level.FINE, this,
    +                          "About to shutdown daemons for Env " + envHome);
                try {
                    shutdownDaemons();
                } catch (InterruptedException IE) {
    ***************
    *** 963,971 ****
                    errors.append(IE.toString()).append("\n");
                }

    -             /* Flush log. */
    -             Tracer.trace(Level.FINE, this,
    -                          "Env " + envHome + " daemons shutdown");
                try {
                    logManager.flush();
                } catch (DatabaseException DBE) {
    --- 966,971 ----
    Linda
  • 5. Re: bug report: NullPointerException on shutdown, v3.2.13
    566845 Newbie
    Currently Being Moderated
    Thanks Linda!
  • 6. Re: bug report: NullPointerException on shutdown, v3.2.13
    greybird Expert
    Currently Being Moderated
    Hello all,

    For the record, the fix for this problem is included in JE 3.2.21:

    Berkeley DB Java Edition 3.2.21 is now available

    Mark