IceJ-Freeze test fails

[shantanu_k06]

Hi,

I am using Sun JDK 1.4.2-04 on a Pentium-III running Fedora Core 1. I have compiled the BDB-4.2.52 source with Java enabled, and later Ice-1.3.0 too.

The IceJ test for Freeze fails with the following output:

*** running tests in ./test/Freeze/dbmap
starting client... ok
Exception in thread "main" java.lang.UnsatisfiedLinkError: no db_java-4.2 in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java :1491)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:834)
at com.sleepycat.db.db_javaJNI.<clinit>(db_javaJNI.ja va:36)
at com.sleepycat.db.DbEnv.<init>(DbEnv.java:1081)
at Freeze.SharedDbEnv.<init>(SharedDbEnv.java:231)
at Freeze.SharedDbEnv.get(SharedDbEnv.java:31)
at Freeze.ConnectionI.<init>(ConnectionI.java:113)
at Freeze.Util.createConnection(Util.java:38)
at Client.run(Client.java:206)
at Client.main(Client.java:501)


Can anyone please help me with this? The CLASSPATH is in order with "db.jar" and "Ice.jar" specified in its scope.


Regards,
Shantanu

[mes]

Hi,

You also need to have the directory containing libdb_java-4.2.so in your LD_LIBRARY_PATH, because BerkeleyDB's Java implementation is really just a thin JNI layer on top of the C implementation.

Take care,
- Mark

[shantanu_k06]

Thanks for pointing that out, it was my fault - I had only changed /etc/ld.so.conf but the cache wasn't updated.

Now after correcting it, the following error displays:

*** running tests in ./test/Freeze/dbmap
starting client... ok
Exception in thread "main" java.lang.AssertionError
at Freeze.Map.containsKey(Map.java:182)
at Client.run(Client.java:229)
at Client.main(Client.java:501)


Regards,
Shantanu

[bernard]

That's a very strange error. This assert verifies that Berkeley DB's Db.get() method return 0 when it does not return DB_NOTFOUND (see src/Freeze/Map.java line 182).

According to
http://www.sleepycat.com/docs/java/c...db.Dbt,%20int), it cannot return any other value (Freeze only uses BTREE databases).

First, I'd recommend to do rm dbmap/db/*, to eliminate any old corrupted database. If this does not solve the problem, could you edit Map.java to find out this "impossible" return value?

Cheers,
Bernard

[shantanu_k06]

Hi Bernard,

Deleting files from dbmap/db/* didn't help. I am going to look into it as you said.

This is a Freeze-specific test error with IceJ-1.3.0. I suppose this test passes with some of the other users who tried it.


Regards,
Shantanu

[shantanu_k06]

Hello Bernard,

Following your instruction, I inserted a System.println () to test the value of "rc" in Freeze/Map.java (line 182) and built it with Ant 1.6.1. Surprisingly "rc" euqualled 0 every time when it was not DB_NOTFOUND, i.e. assert (rc == 0) stood okay. Obviously, the test run was successful too.

Then I commented out the line that I had added, and the test passed again. In fact, the entire test ran okay and not only Freeze/dbmap. The point here to note is -- a rebuild of Ice.jar corrected the problem. When I compared the Ice.jar that comes pre-built with IceJ against the one that I built on my box, they are different. I have used Sun JDK 1.4.2-04 on a Pentium-III running Fedora Core 1 (with the stock kernel).

Sorry for the delay in this response -- I was busy with several things. I believe you'd like to check at your end if the JDK version (used for the build process) has anything to do with the earlier behaviour; could you please also let me know why it is so?


Regards,
Shantanu

[bernard]

Hello Shantanu,

That's probably because the Ice.jar in the IceJ distribution was built with Berkeley DB 4.1.25.
See: Ice.jar for BerkeleyDB 4.2.52

Sorry for not pointing this out earlier!

Bernard