[BUGS] MemoryContextAllc error.

[ricky]

i was trying to back up db from the server. i found the error while i was trying to backup.   bash$ /usr/local/pgsql/bin/pg_dumpall > db.out ERROR:  MemoryContextAlloc: invalid request size 4294967293 PQendcopy: resetting connection SQL query to dump the contents of Table 't_oommain' did not execute correctly.  After we read all the table contents from the backend, PQendcopy() failed.  Explanation from backend: 'ERROR:  MemoryContextAlloc: invalid request size 4294967293 '. The query was: 'COPY "t_oommain" TO stdout; '. pg_dump failed on xenodb, exiting   what shall i do here? please give me the solution for this problem. Thank you very much.