Intermittent SYS.DBMS_LOB error

Question

Approximately 20% of the time my BLOB inserts fail on my Oracle
8.1.7 instance that's running on Solaris. I'm doing all my db
calls via JDBC.
The same code works flawlessly against an 8.1.7 instance running
on Linux. The only difference between the two instances, other
than the OS, is that the BLOBS are stored in an NFS-mounted
volume for the Solaris instance (the one with the problems).
The error I'm getting is as follows:
java.io.IOException: ORA-27052: unable to flush file data
SVR4 Error: 11: Resource temporarily unavailable
Additional information: 3
ORA-06512: at "SYS.DBMS_LOB", line 700
ORA-06512: at line 1
at oracle.jdbc.dbaccess.DBError.SQLToIOException
(DBError.java:531)
at oracle.jdbc.driver.OracleBlobOutputStream.flushBuffer
(OracleBlobOutputStream.java:179)
at oracle.jdbc.driver.OracleBlobOutputStream.write
(OracleBlobOutputStream.java:125)
This same thing seems to happen no matter what version of
Oracle's JDBC driver I use. I've tried the jdk 1.2 drivers for
Oracle 8.1.7, 8.1.7.1 and even 9.0.1.
I'm guessing that the DB is trying to flush the buffer out to
the filesystem and the NFS call is taking too long, or possibly
something else along these lines.
Any ideas on how to solve this one? Pointers would be
appreciated because the documentation doesn't have a lot to say
on this, and I haven't been able to find anything similar in the
discussion forums.
Thanks in advance!

Answer 1

You may helpful this link.
https://kr.forums.oracle.com/forums/thread.jspa?threadID=354057
External LOBs
For an external LOB (BFILE) to be represented by a LOB locator, you must:
Ensure that a DIRECTORY object representing a valid, existing physical directory has been defined, and that physical files (the LOBs you plan to add) exist with read permission for the database. If your operating system uses case-sensitive path names, then be sure you specify the directory in the correct format.
Pass the DIRECTORY object and the filename of the external LOB you are adding to the BFILENAME function to create a LOB locator for your external LOB.
Once you have completed these tasks, you can insert or update a row containing a LOB column using the given LOB locator.
After the LOBs are defined and created, you can then SELECT from a LOB locator into a local PL/SQL LOB variable and use this variable as an input parameter to DBMS_LOB for access to the LOB value.
For details on the different ways to do this, you must refer to the section of the Oracle Database Application Developer's Guide - Large Objects that describes "Accessing External LOBs (BFILEs)."