The current code that works on Android with 2.9.1, but fails with 3.0.2:
Directory dir = FSDirectory.open(file);
...
do something with directory
...
The error we're seeing is:
12-04 21:34:41.629: WARN/System.err(23160): java.lang.NoClassDefFoundError:
java.lang.management.ManagementFactory
12-04 21:34:41.639: WARN/System.err(23160): at
org.apache.lucene.store.NativeFSLockFactory.acquireTestLock(NativeFSLockFactory.java:87)
12-04 21:34:41.639: WARN/System.err(23160): at
org.apache.lucene.store.NativeFSLockFactory.makeLock(NativeFSLockFactory.java:142)
12-04 21:34:41.649: WARN/System.err(23160): at
org.apache.lucene.store.Directory.makeLock(Directory.java:106)
12-04 21:34:41.649: WARN/System.err(23160): at
org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1058)
Turns out Android does not have java.lang.management.ManagementFactory.
There are several work arounds in client code, but not sure what is best.
The bigger question is whether and how Lucene should be modified to accommodate?
Ultimately FSDirectory.open does the following:
if (Constants.WINDOWS) {
return new SimpleFSDirectory(path, lockFactory);
} else {
return new NIOFSDirectory(path, lockFactory);
}
Should Android be a supported client OS?
If so, wouldn't it be better not to have OS specific if-then-else and use
reflection or something else?
Thanks,
DM
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