Metacat

I used web browser to call "buildindex" command to metacat. "buildindex" command DID work. This is good. However, my browser got an error message:
exception

java.lang.StringIndexOutOfBoundsException: String index out of range: 253
java.lang.StringBuffer.charAt(StringBuffer.java:163)
org.geotools.data.shapefile.dbf.DbaseFileWriter$FieldFormatter.getFieldString(DbaseFileWriter.java:241)
org.geotools.data.shapefile.dbf.DbaseFileWriter.fieldString(DbaseFileWriter.java:134)
org.geotools.data.shapefile.dbf.DbaseFileWriter.write(DbaseFileWriter.java:112)
org.geotools.data.shapefile.ShapefileDataStore$Writer.write(ShapefileDataStore.java:1627)
org.geotools.data.shapefile.ShapefileDataStore$Writer.close(ShapefileDataStore.java:1463)
org.geotools.data.TransactionStateDiff.applyDiff(TransactionStateDiff.java:253)
org.geotools.data.TransactionStateDiff.commit(TransactionStateDiff.java:140)
org.geotools.data.DefaultTransaction.commit(DefaultTransaction.java:176)
edu.ucsb.nceas.metacat.spatial.SpatialDataset.insertOrUpdateDataStore(SpatialDataset.java:272)
edu.ucsb.nceas.metacat.spatial.SpatialDataset.insertOrUpdate(SpatialDataset.java:232)
edu.ucsb.nceas.metacat.spatial.SpatialHarvester.harvestDocument(SpatialHarvester.java:174)
edu.ucsb.nceas.metacat.spatial.SpatialHarvester.addToUpdateQue(SpatialHarvester.java:116)
edu.ucsb.nceas.metacat.DocumentImpl.buildIndex(DocumentImpl.java:1677)
edu.ucsb.nceas.metacat.MetaCatServlet.buildDocumentIndex(MetaCatServlet.java:2788)
edu.ucsb.nceas.metacat.MetaCatServlet.handleBuildIndexAction(MetaCatServlet.java:2763)
edu.ucsb.nceas.metacat.MetaCatServlet.handleGetOrPost(MetaCatServlet.java:820)
edu.ucsb.nceas.metacat.MetaCatServlet.doGet(MetaCatServlet.java:351)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.vfny.geoserver.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:122)

This error message will cause user think it didn't work. So we should figure out the reason why caused the error message during the process of "buildindex".