Getting around the sync'ed drivermanager calls

hi
we have a problem with wl5.1 (sp10, jdk 1.3.1, sun 2.6) and jdbc
connections to a mssql server. the sql server sometimes hang in getting
the connection and than everything is hanging. caused by the synchronized
calls in the driver manager - exactly DriverManager.java:193.
i have already searched in the net and found some possible solutions. but
no appropriate which solves the problem, because everything is located in
the DriverManager class.
ok, upgrading to wl61 has not solved the problem. also setting some driver
manager timeouts and all other possible timeouts. also datasources does
not solve the problem!
so, if there is no real solution, so is there a way outside to solve the
problem? is it maybe possible (even if the performance is bad and not
really accepted for j2ee applications) to get the connection in a separate
thread and to set a timer which interupts the thread after X seconds?
would this really stop the blocking io call?
does anyone have any ideas? this is a rellay big problem for us because
we have to restart the server every few hours. the mssql server is really
a big piece of sh*t.
TIA
cu

Hi. There's an easy solution. Instantiate a Driver instance directly,
and use it to make connections, via the Driver.connect() call. That's
all DriverManager does, and it avoid's DriverManager's locks.
Are you using our pools, or the DBMS driver directly? If it's pools:
Driver d = (Driver)Class.forName("weblogic.jdbc.pool.Driver").newInstance();
String myURL = "jdbc:weblogic:pool:myPoolName";
if it's EJB/UserTransactional,
Driver d = (Driver)Class.forName("weblogic.jdbc.jts.Driver").newInstance();
String myURL = "jdbc:weblogic:jts:myPoolName";
if it's a DBMS driver diectly,
Driver d = (Driver)Class.forName("weblogic.jdbc.mssqlserver4.Driver").newInstance();
String myURL = "jdbc:weblogic:mssqlserver4:MYDBMSMACHINE";
In any case, do this once, and re-use all this stuff indefinitely.
Then do:
Properties p = new Properties(); // for pool or jts drivers, don't add any properties...
p.put("user", "sa" );
p.put("password", "secret");
and to connect:
Connection c = d.connect( myURL, p );
Joe Weinstein
Gottfried Szing wrote:
hi
we have a problem with wl5.1 (sp10, jdk 1.3.1, sun 2.6) and jdbc
connections to a mssql server. the sql server sometimes hang in getting
the connection and than everything is hanging. caused by the synchronized
calls in the driver manager - exactly DriverManager.java:193.
i have already searched in the net and found some possible solutions. but
no appropriate which solves the problem, because everything is located in
the DriverManager class.
ok, upgrading to wl61 has not solved the problem. also setting some driver
manager timeouts and all other possible timeouts. also datasources does
not solve the problem!
so, if there is no real solution, so is there a way outside to solve the
problem? is it maybe possible (even if the performance is bad and not
really accepted for j2ee applications) to get the connection in a separate
thread and to set a timer which interupts the thread after X seconds?
would this really stop the blocking io call?
does anyone have any ideas? this is a rellay big problem for us because
we have to restart the server every few hours. the mssql server is really
a big piece of sh*t.
TIA
cu

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Getting around the sync'ed drivermanager calls

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