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New ojdbc 7 12.0.1.2 maximum cursor limit exceeded

cplaistowMar 5 2015 — edited Mar 5 2015

We are running a set of unit tests using the latest ojdbc 7 driver and the highest open cursor keeps going up, until it hits our 300 limit, then throws the cursor limit exception. If we run these tests using ojdbc 12.0.1.1, the highest open cursor stays at 17 and doesn't cause this exception.

The query used to monitor these cursors is below:

SELECT  max(a.value) as highest_open_cur, p.value as max_open_cur FROM v$sesstat a, v$statname b, v$parameter p WHERE  a.statistic# = b.statistic#  and b.name = 'opened cursors current' and p.name= 'open_cursors' group by p.value

Has anyone else had this problem?

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

Java 8 version 31

Comments

jtahlborn
Basically, java wasn't designed to be that low level. Other than that, probably no good reason.
800670
Yes, I see, but why isn´t it possible to write the header myself when it consists of usual bytes? That is what I can not understand.
EJP
At a guess it is because either (a) using raw sockets requires privileges and/or (b) Microsoft keep changing the raw sockets API or (c) it's a general-purpose programming language and why would you want to do that?
++sja
You can do raw sockets with third party libraries. They won't be pure java - but you didn't really expect to do raw sockets on your cell phone or TV set top box, or spy and spoof someone's network using an applet.

The FAQ for one such library hints what kind of a mess raw sockets are due to differences in common operating systems; see http://www.savarese.com/software/rocksaw/
At least to some extent the windows API didn't support raw access when java first came out.

So lowest common denominator would be a more likely explanation.
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Locked on Apr 2 2015
Added on Mar 5 2015
#java-database-connectivity-jdbc
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