Oracle Text search returning no results

Question

Hi,
I have created an oracle text (ctxsys.context) on a BLOB column which has various documents of .doc,.docx,.pdf, types.
CREATE INDEX IND_RESUME_DETAILS ON RESUME_DETAILS (RESUME)
   INDEXTYPE IS CTXSYS.CONTEXT
PARAMETERS ('datastore ctxsys.default_datastore filter ctxsys.inso_filter sync (on commit)')
However, the query using 'Contains' does not return any search results.
select employee_number,Score(1) from resume_details where CONTAINS(RESUME,'JAVA',1)>0 order by score(1) desc
On checking the  'ctx_user_index_errors' view , it has an entry for every row in the table. However, it does not show any error in the err_text column
ERR_INDEX_NAME
ERR_TIMESTAMP
ERR_TEXTKEY
ERR_TEXT
IND_RESUME_DETAILS
5/8/2014 18:27
AAAl0GAAGAAEFoWAAC
IND_RESUME_DETAILS
5/8/2014 18:27
AAAl0GAAGAAEFoWAAD
IND_RESUME_DETAILS
5/8/2014 18:27
AAAl0GAAGAAEFoWAAE
Even the index status shows 'VALID'.
I tried dropping and recreating indexes, dropping and recreating the table.. However, it's not working at all.
What's surprising is,it used to work earlier without any problems.
I also have another context index on  another column on the same  table which is a varchar2 column. The search on that column works absolutely fine.
The database version is
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0
Request someone in helping  me root cause this issue. Any help is appreciated.
Thanks

Answer 1

Hi Barbara,
Still the same issue.
Its putting an entry into 'ctx_user_index_errors' but with nothing in the err_text column..Hence, difficult to track what or where the problem lies.
And moreover, the same index was working earlier. Just stopped working all of a sudden.