Timeout Problem with Two-Way SSL when Retreiving BLOBs Using getBlob().getBytes() (Doc ID 734328.1)

Last updated on OCTOBER 27, 2008

Applies to:

Advanced Networking Option - Version: 10.2.0.4.0
This problem can occur on any platform.

Symptoms

With 2-way SSL enabled  for communication between the client library (Oracle Thin JDBC driver) and Oracle server, after upgrading your environment to Oracle 10.2.0.4.0 you start to experience non-deterministic errors while retrieving blob bodies from the database. A typical access pattern is to perform a query that brings back one or more blob columns as well as a number of other fields. You then access the contents via getBlob().getBytes(). At this point you intermittently get a disconnect message.

On the client, you see:


java.sql.SQLException: Io exception: Connection reset
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
at oracle.jdbc.driver.T4CConnection.length(T4CConnection.java:1782)
at oracle.sql.BLOB.length(BLOB.java:155)

Server side trace file has the following errors:

[30-JUL-2008 00:03:22:955] nsprecv: reading from transport...
[30-JUL-2008 00:03:22:955] ntzread: entry
[30-JUL-2008 00:03:22:955] ntznzosread: entry
[30-JUL-2008 00:03:22:955] nttrd: entry
[30-JUL-2008 00:03:22:955] ntt2err: entry
[30-JUL-2008 00:03:22:955] ntt2err: exit
[30-JUL-2008 00:03:22:955] nttrd: socket 11 had bytes read=0
[30-JUL-2008 00:03:22:955] nttrd: exit
[30-JUL-2008 00:03:22:955] ntznzosread: encountered "wouldblock" error
[30-JUL-2008 00:03:22:955] sntpoltsts: exit
[30-JUL-2008 00:03:22:955] ntznzosread: exit
[30-JUL-2008 00:03:22:956] nserror: nsres: id=1, op=68, ns=12535, ns2=12609; nt[0]=0, nt[1]=0,
nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0
[30-JUL-2008 00:03:22:956] nsdo: nsctxrnk=0
[30-JUL-2008 00:03:22:956] nioqrc: wanted 1 got 0, type 0
[30-JUL-2008 00:03:22:956] nioqper: error from nioqrc
[30-JUL-2008 00:03:22:956] nioqper: ns main err code: 12535
[30-JUL-2008 00:03:22:956] nioqper: ns (2) err code: 12609
[30-JUL-2008 00:03:22:956] nioqper: nt main err code: 0
[30-JUL-2008 00:03:22:956] nioqper: nt (2) err code: 0
[30-JUL-2008 00:03:22:956] nioqper: nt OS err code: 0


Changes

It is suspected but not confirmed that this may have something to do with the support for Out Of band Breaks in the new JDBC Thin drivers as explained in <<note 469804.1>>

Cause

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