db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sunitha Kambhampati (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-300) Creation of SQLWarning on a getConnection causes hang on 131 vms when server and client are in same vm.
Date Thu, 19 May 2005 05:41:55 GMT
     [ http://issues.apache.org/jira/browse/DERBY-300?page=all ]

Sunitha Kambhampati updated DERBY-300:
--------------------------------------

    Attachment: testNS.java

Repro for the hang. To run java testNS 

> Creation of SQLWarning on a getConnection causes hang on 131 vms when server and client
are in same vm.
> -------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-300
>          URL: http://issues.apache.org/jira/browse/DERBY-300
>      Project: Derby
>         Type: Bug
>   Components: JDBC
>     Versions: 10.1.0.0
>  Environment: seems to occur on 131 vms, hang seen on both sun 1.3.1 and ibm 1.3.1
>     Reporter: Sunitha Kambhampati
>     Priority: Trivial
>  Attachments: testNS.java
>
> Problem - with 131 vms, if server and client are in the same jvm, on a second get connection
with create=true attribute in the url, there is a hang.
> Basically,
> -- the first getConnection works ok
> -- but on the second getConnection, a SQLWarning needs to be generated  to say that the
database already exists and in this scenario, it seems like at the point where it is creating
a SQLWarning , there is a deadlock. The call to SQLWarning constructor does not return. On
doing a java core dump , the thread in question seems to be in a wait state (conditional wait).
 Guess is it has to do with the driver manager lock 
> Also note, this problem is observed only with 131 vms, so I guess it was fixed in the
later vms (1.4.1, 1.4.2 1.5)
> Opened this entry to keep track of this.

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
   http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
   http://www.atlassian.com/software/jira


Mime
View raw message