I am using Sun's JRE 1.6.0_02 on Windows XP Actually...are you sure it would work? java.util.Vector has the following clone() method:
public Object <http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Object.html> *clone*() { } I didn't think you can cast a base class (Vector) to its derived class (SegmentInfos) in Java? On Fri, Oct 3, 2008 at 6:16 PM, Michael McCandless < [EMAIL PROTECTED]> wrote: > > That's Sun's JRE? That should be fine, unless there's something seriously > wrong with it's java.util.Vector implementation. > > But, this is an exceptionally strange exception. Maybe try a different > version of the JRE? > > Any odd JARs on your CLASSPATH? > > What hardware/OS? > > > Mike > > Paul Chan wrote: > > I am using Java 1.6.0_02. Is this a problem? >> >> On Fri, Oct 3, 2008 at 5:35 PM, Michael McCandless < >> [EMAIL PROTECTED]> wrote: >> >> >>> Which Java environment are you running? >>> >>> super.clone() from SegmentInfos should produce a new SegmentInfos object. >>> >>> It seems like in your case it's somehow producing a Vector instead? >>> >>> Mike >>> >>> >>> Paul Chan wrote: >>> >>> Hi Mike, >>> >>>> >>>> I am actually using the Compass Search Engine which in turn makes use of >>>> Lucene. They are doing the following in their code: >>>> >>>> IndexWriter indexWriter = new IndexWriter(dir, autoCommit, analyzer, >>>> create, deletionPolicy); >>>> >>>> where autoCommit = false. >>>> >>>> In turn, Lucene will do the following: >>>> >>>> public class IndexWriter { >>>> >>>> public IndexWriter(Directory d, boolean autoCommit, Analyzer a, >>>> boolean create, IndexDeletionPolicy deletionPolicy) >>>> throws CorruptIndexException, LockObtainFailedException, IOException >>>> { >>>> init(d, a, create, false, deletionPolicy, autoCommit); >>>> } >>>> >>>> private void init(Directory d, Analyzer a, final boolean create, >>>> boolean closeDir, IndexDeletionPolicy deletionPolicy, >>>> boolean autoCommit) >>>> { >>>> ... >>>> .. >>>> if (!autoCommit) { >>>> rollbackSegmentInfos = (SegmentInfos) segmentInfos.clone(); >>>> } >>>> } >>>> } >>>> >>>> which calls the clone() method that causes the exception because >>>> autoCommit >>>> = false. >>>> >>>> On Fri, Oct 3, 2008 at 4:54 PM, Michael McCandless < >>>> [EMAIL PROTECTED]> wrote: >>>> >>>> >>>> Can you describe what led up to this exception? Ie, what calls you >>>>> made >>>>> to >>>>> Lucene before this. >>>>> >>>>> Mike >>>>> >>>>> >>>>> Paul Chan wrote: >>>>> >>>>> I think I know what the problem is looking at the code: >>>>> >>>>> >>>>>> In SegmentInfos.java (line 321): >>>>>> >>>>>> class SegmentInfos extends Vector >>>>>> { >>>>>> public Object clone() { >>>>>> SegmentInfos sis = (SegmentInfos) super.clone(); >>>>>> for(int i=0;i<sis.size();i++) { >>>>>> sis.setElementAt(((SegmentInfo) sis.elementAt(i)).clone(), i); >>>>>> } >>>>>> return sis; >>>>>> } >>>>>> } >>>>>> >>>>>> We see that it is trying to cast a Vector into SegmentInfos which >>>>>> explains >>>>>> the ClassCastException. This is definitely a bug. >>>>>> >>>>>> >>>>>> On Fri, Oct 3, 2008 at 3:40 PM, Paul Chan <[EMAIL PROTECTED]> >>>>>> wrote: >>>>>> >>>>>> Hi, >>>>>> >>>>>> >>>>>>> I am using lucene 2.3.2 and I encounter the following exception when >>>>>>> I >>>>>>> try >>>>>>> to insert a object into the index. >>>>>>> >>>>>>> Caused by: java.lang.ClassCastException: java.util.Vector cannot be >>>>>>> cast >>>>>>> to >>>>>>> org.apache.lucene.index.SegmentInfos >>>>>>> at org.apache.lucene.index.SegmentInfos.clone(SegmentInfos.java:321) >>>>>>> at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:715) >>>>>>> at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:666) >>>>>>> >>>>>>> Has Anyone seen this problem before? What seems to be the problem? >>>>>>> >>>>>>> Thanks! >>>>>>> >>>>>>> >>>>>>> >>>>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: [EMAIL PROTECTED] >>>>> For additional commands, e-mail: [EMAIL PROTECTED] >>>>> >>>>> >>>>> >>>>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: [EMAIL PROTECTED] >>> For additional commands, e-mail: [EMAIL PROTECTED] >>> >>> >>> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
