Restarting Apache on reaching Max Connections

Hi All,
We are using OAS 10.1.3.1 in Solaris environment. Presently we have set max connections to 350. Once connections reaches max, apache is getting hanged & it resumes once we restart services using opmnctl. Is there any way to make restart apache by itself, once it reaches max connections.
thanx & regards

hi...
the best thing you can do is increase the max connection value... is it a prod insatance? since normally for prod instances its a higher value.
Rgds...R

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Apache POST flex2gateway never closes or times out, reaches max child processes

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Server Version: Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_wsgi/3.2 Python/2.6.6 mod_jk/1.2.32 mod_perl/2.0.4 Perl/v5.10.1
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Javax.resource.spi.ResourceAdapterInternalException: max connections reache

Hello,
I am writing an application to read messages from queues.
Everything seems to be working fine, but after a number of un-deployments and deployments I start getting the following exception and have no choice but to restart the application server.
Any hint on what the root cause might be?
Exception stack trace:
2008-02-15 14:47:19,095 WARN [org.jboss.system.ServiceController:424] Problem starting service jboss.j2ee:ear=Application-1.0.ear,jar=Application-1.0.jar,name=MDB,service=EJB3
org.jboss.deployment.DeploymentException: Endpoint activation failed ra=jboss.jca:service=RARDeployment,name='wmq.jmsra.rar' activationSpec=javax.jms.Queue:wsmq/Q@@localhost; - nested throwable: (javax.resource.spi.ResourceAdapterInternalException: max connections reached)
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     at org.jboss.ejb3.mdb.inflow.JBossMessageEndpointFactory.activate(JBossMessageEndpointFactory.java:310)
     at org.jboss.ejb3.mdb.inflow.JBossMessageEndpointFactory.start(JBossMessageEndpointFactory.java:194)
     at org.jboss.ejb3.mdb.MessagingContainer.startProxies(MessagingContainer.java:190)
     at org.jboss.ejb3.mdb.MessagingContainer.start(MessagingContainer.java:156)
     at org.jboss.ejb3.mdb.MDB.start(MDB.java:126)
     at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.ejb3.ServiceDelegateWrapper.startService(ServiceDelegateWrapper.java:103)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
     at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
     at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
     at $Proxy0.start(Unknown Source)
     at org.jboss.system.ServiceController.start(ServiceController.java:417)
     at org.jboss.system.ServiceController.start(ServiceController.java:435)
     at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
     at $Proxy361.start(Unknown Source)
     at org.jboss.ejb3.JmxKernelAbstraction.install(JmxKernelAbstraction.java:120)
     at org.jboss.ejb3.Ejb3Deployment.registerEJBContainer(Ejb3Deployment.java:301)
     at org.jboss.ejb3.Ejb3Deployment.start(Ejb3Deployment.java:362)
     at org.jboss.ejb3.Ejb3Module.startService(Ejb3Module.java:91)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
     at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
     at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
     at $Proxy0.start(Unknown Source)
     at org.jboss.system.ServiceController.start(ServiceController.java:417)
     at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
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     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
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     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
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     at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
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     at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:225)
Caused by: javax.resource.spi.ResourceAdapterInternalException: max connections reached
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     at org.jboss.system.ServiceDynamicMBeanSupport.invoke(ServiceDynamicMBeanSupport.java:156)
     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
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     ... 101 more
ObjectName: jboss.j2ee:ear=Application-1.0.ear,jar=Application-1.0.jar,name=MDB,service=EJB3
State: FAILED
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- JBoss 4.2.2-GA (linux)
- WS MQ 6.0.2.2 (linux)
I have configured JBoss the following way:
- added wmq.jmsra.rar to the $JBOSS_SERVER/deploy directory
- added com.ibm.mqetclient.jar to the $JBOSS_SERVER/lib directory
- created $JBOSS_SERVER/deploy/wmq.jmsra-ds.xml as follows
<?xml version="1.0" encoding="UTF-8"?>
<connection-factories>

<mbean code="org.jboss.resource.deployment.AdminObject" name="jca.wmq:name=wsmqQ">
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</mbean>

<tx-connection-factory>
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    <rar-name>wmq.jmsra.rar</rar-name>
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    <config-property name="channel" type="java.lang.String">SYSTEM.DEF.SVRCONN</config-property>
    <config-property name="hostName" type="java.lang.String">127.0.0.1</config-property>
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    <config-property name="transportType" type="java.lang.String">CLIENT</config-property>
</tx-connection-factory>My java MDB (EJB3) is:
@MessageDriven(name = "MDB", activationConfig = {
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public class MDB implements MessageListener {
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cheers!

hi
this is known to IBM as APAR IC54346 - fixed in pack 6.0.2.3

REP-56055 Max Connect......URGENT!!!!!

Hi,
Am getting this max connect error quite regularly and having to restart the reports server. I have the max connect parameter set to 40 and there is only me running reports one at a time. Is there anything else that maybe tiying up connections? Any problems or specifics about the configuration i need to know.
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Thanks

How did you over come this error.. we are into the same situation now.

How do I gracefully restart Apache?

Is there any way to gracefully restart Apache? On a standard setup I would normally run this command:
<pre>sudo apachectl graceful</pre>
But the Apache 2 that comes with OS X Server 10.5 does not gracefully restart with this command. Instead it will interrupt all open connections stopping all downloads. I'm assuming this is because Apache is handled by launchd which doesn't support graceful restarts. Is there any way to get around this problem?

I decided maybe there's a man page that will point in the right direction:
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This is a complete stab in the dark. Launchd can receive commands from launchctl. but the launchctl command syntax is not the same as say apachectl. Try this command:
launchctl submit -p apachectl graceful
Let me know if that really performs a graceful restart. I'm a big fan of the graceful restart myself, and would hate to see that option not available from the commandline.

Log Format & Max connections

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for Apache we use to do that in httpd.conf with %T
what is the equalent of max connection in Sun one web server?
Thanks in advance...

%duration%

How to set min & max connections for MSSQLconnection pool

Hi,
I want to set minconnection, maxconnection, idletimeout initial limit for the pool
I have got a MSSQL database connection using following java code.
// MSSQL DbConnection Code
import java.sql.*;
public class MsSqlDataSource
public static void main(String arr[])
Connection con = null;
ResultSet rs = null;
try{
com.microsoft.sqlserver.jdbc.SQLServerDataSource ds = new com.microsoft.sqlserver.jdbc.SQLServerDataSource();
ds.setServerName("10.50.50.51");
ds.setPortNumber(1711);
ds.setDatabaseName("test");
ds.setUser("starhome");
ds.setPassword("starhome");
con = ds.getConnection();
}catch(Exception e){}
}In oracle i have passed min and max number of connection properties through setConnectionCacheProperties method.
//Connection Pooling using Oracle Data Source:
m_connSource = new OracleDataSource();
m_connSource.setDriverType("thin");
m_connSource.setServerName(m_host);
m_connSource.setNetworkProtocol("tcp");
m_connSource.setDatabaseName(m_db);
m_connSource.setPortNumber(m_port);
m_connSource.setUser(m_user);
m_connSource.setPassword(m_password);
// Enable caching. m_connSource.setConnectionCachingEnabled(true);
java.util.Properties prop = new java.util.Properties();
prop.setProperty("MinLimit", m_minConnections);
prop.setProperty("MaxLimit", m_maxConnections);
prop.setProperty("InitialLimit", m_initialConnections);
prop.setProperty("InactivityTimeout", m_inactivityTimeout);
prop.setProperty("AbandonedConnectionTimeout", m_abandonedTimeout);
prop.setProperty("ConnectionWaitTimeout", m_connWaitTimeout);
m_connSource.setConnectionCacheProperties(prop);I dont know how to pass min and max number of connection properties for SQLServerDataSource. Is there any method available to pass min and max number of connection properties for SQLServerDataSource.
Iam using Tomcat. I found one way to set min and max connections for pool by doing changes in context.xml and web.xml using below url http://tomcat.apache.org/tomcat-4.1-doc/jndi-datasource-examples-howto.html
I dont want to touch tomcat configuration files. I need to set connection pooling properties which is independent of application server.
Please anybody give solution for this?
Thanks,
Prisha

Hi,
you need to define your database under the DB Admin tab. In the Schema objects node you'll find Sequence Implementations, and there you can definde min max values as well as caching and increments.
Gerald

Can't reach max (also with fancontrol) and min fan speed manually

I'm using fancontrol to control my fan's speed. One thing I noticed is that maximum fan speed is never reached even when temperatures exceed max limit.
If I set max temperature in /etc/fancontrol to 55 and restart fancontrol, 55+°C will cause fan to speed only at ~5800 RPM. If I set min temperature to 60, fans will completely stop. 'pwm_enable' is set to 1 when fancontrol is running.
Now if I stop fancontrol, fan will speed up to ~6460 RPM while 'pwm' is at 255 and 'pwm_enable' changed to 0. I can't change 'pwm' value at this point. If 'pwm' gets set to 0, fan will completely stop.
At this point fancontrol is still not running. If I set 'pwm_enable' to 1 and leave 'pwm' at 255, fan will slow down to ~5800 RPM. If I set 'pwm' to 0, fan will not slow down completely, but will instead slow down to ~2080 RPM.
What's interesting is that although fancontrol can't reach max fan speed, it can stop fan completely, while I can do neither manually.
Any idea how to enable at least max fan speed for fancontrol?

I'm using fancontrol to control my fan's speed. One thing I noticed is that maximum fan speed is never reached even when temperatures exceed max limit.
If I set max temperature in /etc/fancontrol to 55 and restart fancontrol, 55+°C will cause fan to speed only at ~5800 RPM. If I set min temperature to 60, fans will completely stop. 'pwm_enable' is set to 1 when fancontrol is running.
Now if I stop fancontrol, fan will speed up to ~6460 RPM while 'pwm' is at 255 and 'pwm_enable' changed to 0. I can't change 'pwm' value at this point. If 'pwm' gets set to 0, fan will completely stop.
At this point fancontrol is still not running. If I set 'pwm_enable' to 1 and leave 'pwm' at 255, fan will slow down to ~5800 RPM. If I set 'pwm' to 0, fan will not slow down completely, but will instead slow down to ~2080 RPM.
What's interesting is that although fancontrol can't reach max fan speed, it can stop fan completely, while I can do neither manually.
Any idea how to enable at least max fan speed for fancontrol?

JDBC Connection pools and clusters (is max connection for entire cluster?)

Hi,
Quick question.
When using JDBC connection pools in WAS 6.40 (SP13) in a clustered environment. Are the max connections the number
a)Each application server can use
b)The entire cluster can use
Would believe a), but I'd like it confirmed from someoneelse

Hi Dagfinn,
your assumption is correct. Therefore, in a cluster environment you'd need to make sure the DB can open <i>Number of nodes X max connections</i>.

How to catch exception when have max connection pool

hi,
i have define in oracle user that i could have max 10 sessions at the same time.
I have jdbc datasource & connection pool defined at glassfish server(JSF application).
now, if in application is too many queries to the database then i have error: nullpointer exception - becouse when i try to do:
con = Database.createConnection(); - it generates nullpointer exception becouse there isn't free connection pool
i try to catch exception like this:
public List getrep_dws_wnioski_wstrzymane_graph() {     int i = 0;     try {     con = Database.createConnection();     ps =    (Statement) con.createStatement();     rs = ps.executeQuery("select data, klasa, ile_dni_wstrzymana, ile_wnioskow from stg1230.dwsww_wstrzymane_dws8 order by data, klasa, ile_dni_wstrzymana, ile_wnioskow");     while(rs.next()){       rep_dws_wnioski_wstrzymane_graph.add(i,new get_rep_dws_wnioski_wstrzymane_graph(rs.getString(1),rs.getString(2),rs.getString(3),rs.getString(4)));       i++;     }     } catch (NamingException e) {         e.printStackTrace();     } catch (SQLException e) {         e.printStackTrace();     } catch (NullPointerException e) {         e.printStackTrace();         throw new NoConnectionException(); // catch null 1     } finally {     try {         con.close();     } catch (SQLException e) {         e.printStackTrace();     } catch (NullPointerException e) {         e.printStackTrace();         throw new NoConnectionException(); // catch null 2     }     } return rep_dws_wnioski_wstrzymane_graph; }
but at line:
con.close();
i have nullpointerexception
and
at line
throw new NoConnectionException(); // catch null 2
i have: caused by exception.NoConnectionException
what's wrong with my exception class? how to resolve it?
public class NoConnectionException extends RuntimeException{     public NoConnectionException(String msg, Throwable cause){       super(msg, cause);     }     public NoConnectionException(){       super();     } }
at web.xml i have defined:
<error-page>         <exception-type>exception.NoConnectionException</exception-type>         <location>/NoConnectionExceptionPage.jsp</location>     </error-page>

thanks,
i did it and i have error:
java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: ORA-02391: exceeded simultaneous SESSIONS_PER_USER limit
at com.sun.gjc.spi.base.DataSource.getConnection(DataSource.java:115)
at logic.Database.createConnection(Database.java:37): conn = ds.getConnection();
public class Database {
     public static Connection createConnection() throws NamingException,
                SQLException {
            Connection conn = null;
            try{
                Context ctx = new InitialContext();
          if (ctx == null) {
               throw new NamingException("No initial context");
          DataSource ds = (DataSource) ctx.lookup("jdbc/OracleReports");
          if (ds == null) {
               throw new NamingException("No data source");
          conn = ds.getConnection(); // here's exception when max connections to database
          if (conn == null) {
               throw new SQLException("No database connection");
            } catch (NamingException e) {
                e.printStackTrace();
                throw new NoConnectionException();
         } catch (SQLException e) {
             e.printStackTrace();
                throw new NoConnectionException();
            catch (NullPointerException e) {
             e.printStackTrace();
                throw new NoConnectionException(); // obsluga bledy na wypadek jesli braknie wolnych polaczen do bazy
        return conn;
}and at my ealier code i have error:
at logic.GetDataOracle.getrep_dws_wnioski_wstrzymane_graph(GetDataOracle.java:192)
at line: con = Database.createConnection();
in code:
public List getrep_dws_wnioski_wstrzymane_graph() {
    int i = 0;
    try {
    con = Database.createConnection();
    ps =    (Statement) con.createStatement();
    rs = ps.executeQuery("select data, klasa, ile_dni_wstrzymana, ile_wnioskow from stg1230.dwsww_wstrzymane_dws8 order by data, klasa, ile_dni_wstrzymana, ile_wnioskow");
    while(rs.next()){
      rep_dws_wnioski_wstrzymane_graph.add(i,new get_rep_dws_wnioski_wstrzymane_graph(rs.getString(1),rs.getString(2),rs.getString(3),rs.getString(4)));
      i++;
    } catch (NamingException e) {
        e.printStackTrace();
    } catch (SQLException e) {
        e.printStackTrace();
    } catch (NullPointerException e) {
        e.printStackTrace();
        throw new NoConnectionException();
    } finally {
    try {
        if(con != null)
        con.close();
    } catch (SQLException e) {
        e.printStackTrace();
    } catch (NullPointerException e) {
        e.printStackTrace();
        throw new NoConnectionException();
return rep_dws_wnioski_wstrzymane_graph;
}so what's wrong?
i have limit max sessions 10 at oracle so i set at my connection pool 5 connections as max. But when i get max 5 sesssins and try to execute next query then i can't catch exception..

REP-56055: Exceed max connections allowed: 20

I have a application server and a db server.I run several reports,then the error message comes up.So I reboot the app server but the problem isn't fixed.
How to solve the problem?

When you have a problem like this it is useful to search the forum for the error message.
See: REP-56055: Exceed max connections allowed: 20
A quick goggle search found:
http://www.rittman.net/archives/000514.html

Am having all kinds of trouble enabling Home Sharing on Apple TV. Had been working previously, but now I am unable to share files between TV, Ipods and iMac. I have tried restarting all hardware, systems and connections. I recently upgraded modem?

Am having all kinds of trouble enabling Home Sharing on Apple TV 3. Had been working previously, but now I am unable to share files between TV, Ipods and iMac. I have tried restarting all hardware, systems and connections. I recently upgraded modem, would this have an effect on connectivity?

U may need to check the settings on ur PC or Mac.

How to restart Apache

I am having trouble starting my web server and filemaker pro server. I think it would help if I could restart Apache. Does anyone know what the commands are for doing this on Leopard Server in terminal?

to restart apache safely with Terminal, under root
serveradmin stop web; serveradmin start web
If you’ve made some modifications on some apache config files by hand (which means not using Server Admin/Web anymore usually), it’s a good idea to test the configuration before restarting Apache.
Then you can use the apachectl command:
apachectl -t
to restart only teams server :
serveradmin stop teams; serveradmin start teams
Once the services says they have restarted give them few more seconds before trying to access them.
That’s my experience anyways. Hope it helps.

Caanot restart apache after installing mod_jk connector

Hallo,
I have installed the mod_jk connector to use seperate apache and tomcat instances for my web ap. I followed the instructions here: http://www.onjava.com/pub/a/onjava/2002/11/20/tomcat.html?page=2
After making changes to httpd.conf, I am unable to restart apache - the sevent viewer gives the following message:
"The Apache2 service terminated with service-specific error 1. "
I think it has something to do with the addmodule lines i've added. Here is what I added to httpd.conf:
AddModule mod_jk.c
# JkWorkersFile C:/tomcat/Tomcat 5.5/conf/workers.properties
# JkLogFile C:/tomcat/Tomcat 5.5/logs/mod_jk.log
# JkLogLevel debug
# Alias /toolkit C:/tomcat/Tomcat 5.5/webapps/toolkitv3
# JkMount /toolkit/servlet/* ajp13w
# JkMount /toolkit/*.jsp ajp13w
# <location "/toolkit/web-inf/">
# AllowOverride None
# deny from all
# </location
(all uncommented of course)
I hope someone out there can help me with this.
Thanks

I used the mod-jk.dll and loadModule :
# Load mod_jk module
# Update this path to match your modules location
LoadModule jk_module modules/mod_jk.dll
# Declare the module for <IfModule directive>
#AddModule mod_jk.c
# Where to find workers.properties
# Update this path to match your conf directory location (put workers.properties next to httpd.conf)
JkWorkersFile c:/Apache/Apache2/conf/workers.properties
# Where to put jk logs
# Update this path to match your logs directory location (put mod_jk.log next to access_log)
JkLogFile c:/Apache/Apache2/logs/mod_jk.log
# Set the jk log level [debug/error/info]
JkLogLevel debug
# Select the log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
# JkOptions indicate to send SSL KEY SIZE,
#JkOptions ForwardKeySize ForwardURICompat -ForwardDirectories
# JkRequestLogFormat set the request format
JkRequestLogFormat "%w %V %T"
# Send everything for context /examples to worker named worker1 (ajp13)
JkMount /examples/* loadbalancer
JkMount /olp/* loadbalancer

How to increase the max connections for business rules.

How and where to increase the connection to EAS.currently we have max connection as 20.Also please let me know,what is the maximum connection we can increase.
In our system totally,we have 350 users are present.
when more that 20 users running the business rule,EAS is stopped.

You can find this in the application property section in planning. Just navigate to Manage Properties and update the JDBC max connections and JDBC Olap connections to your desired number.

Restarting Apache on reaching Max Connections

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