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Thread: Intermittent Connection problems using JDBC

Intermittent Connection problems using JDBC

From
"Srinivas Kotapally"
Date:
Hi All
 
I am connecting to my DB using a JDBC connection and sometimes I get this error.  This is not consistent and does not happen all the time.  I have tried to use various methods to troubleshoot this to no avail.  Can this occur if the connection to the database is delayed?  I have noticed some network issues off and on in our network.  What is the default connection timeout in pgsql-jdbc and would that result in causing this error in the log OR is this an error that is generated when the request reaches the DB host machine?  Please advise... we getting tripped by this issue!
 
CDBConnectionPool.newConnection() : SQLException= org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
 
Regards

Srini

Re: Intermittent Connection problems using JDBC

From
"Srinivas Kotapally"
Date:
No, the error in that case is different.  It is "Too many connections..."

From: Andrew Lazarus [mailto:drlaz@attglobal.net]
Sent: Friday, June 08, 2007 5:50 PM
To: Srinivas Kotapally
Cc: pgsql-jdbc@postgresql.org
Subject: Re: [JDBC] Intermittent Connection problems using JDBC

Hello Srinivas,


Is it possible that the pool is exceeding max_connections as specified on the server postgresql.conf file?


Thursday, June 7, 2007, 3:21:58 PM, you wrote:


>

Hi All

 

I am connecting to my DB using a JDBC connection and sometimes I get this error.  This is not consistent and does not happen all the time.  I have tried to use various methods to troubleshoot this to no avail.  Can this occur if the connection to the database is delayed?  I have noticed some network issues off and on in our network.  What is the default connection timeout in pgsql-jdbc and would that result in causing this error in the log OR is this an error that is generated when the request reaches the DB host machine?  Please advise... we getting tripped by this issue!

 

CDBConnectionPool.newConnection() : SQLException= org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

 

Regards


Srini





-- 

Best regards,

 Andrew                            mailto:drlaz@attglobal.net

Re: Intermittent Connection problems using JDBC

From
Andrew Lazarus
Date:
<p>Hello Srinivas,<p><br /><p>Is it possible that the pool is exceeding max_connections as specified on the server
postgresql.conffile?<p><br /><p>Thursday, June 7, 2007, 3:21:58 PM, you wrote:<p><br /><div><table border="0"
cellpadding="1"cellspacing="2"><tr valign="top"><td style="background-color: #0000ff;" width="12"><p><span
class="rvts6">></span></td><tdstyle="background-color: #ffffff;" width="734"><p><span class="rvts7">Hi
All</span><p><spanclass="rvts8"> </span><p><span class="rvts7">I am connecting to my DB using a JDBC connection and
sometimesI get this error.  This is not consistent and does not happen all the time.  I have tried to use various
methodsto troubleshoot this to no avail.  Can this occur if the connection to the database is delayed?  I have noticed
somenetwork issues off and on in our network.  What is the default connection timeout in pgsql-jdbc and would that
resultin causing this error in the log OR is this an error that is generated when the request reaches the DB host
machine? Please advise... we getting tripped by this issue!</span><p><span class="rvts8"> </span><p><span
class="rvts7">CDBConnectionPool.newConnection(): SQLException= org.postgresql.util.PSQLException: Connection refused.
Checkthat the hostname and port are correct and that the postmaster is accepting TCP/IP connections.</span><p><span
class="rvts8"> </span><p><spanclass="rvts7">Regards</span><p><br /><p><span
class="rvts7">Srini</span></td></tr></table></div><p><br/><p><br /><p><br /><p><br /><p><span
class="rvts9">-- </span><p><spanclass="rvts9">Best regards,</span><p><span class="rvts9"> Andrew                      
    </span><a class="rvts10" href="mailto:drlaz@attglobal.net">mailto:drlaz@attglobal.net</a>