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opmn service listening to external connections - issue

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# 1  
Old 12-09-2009
opmn service listening to external connections - issue
Hello Gentlemen,

Its been a looong time I have posted here. I need a clarification. We started up the OPMN service (for Oracle App server) on Linux box. The service was supposed to listen on port 6005.

The service started up and was listening to 6005 but looks like it was listening only to localhost calls. I mean this service was not lsitening to requests coming from other servers.

I listed the services using -
Code:
[oraias@shk-oratestintegration01 conf]$  netstat -lnptu|grep 6005
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:6005              0.0.0.0:*                   LISTEN      29587/opmn

What could be the problem? We are planning to restart the entire App Server for this purpose as we havent got any clue to why it happened. We have another server where we have same setup, but the issue doesnt occur there.

In the other server -
Code:
[oraias@SHK-ORADEVAPP02 conf]$ netstat -lnptu|grep 6005
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:6005              0.0.0.0:*                   LISTEN      8080/opmn
tcp        0      0 192.168.1.83:6005           0.0.0.0:*                   LISTEN      8080/opmn

Any suggestions please!
Code:
[oraias@SHK-ORADEVAPP02 conf]$ uname -a
Linux SHK-ORADEVAPP02 2.6.9-89.0.0.0.1.ELsmp #1 SMP Tue May 19 05:31:20 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

Regards,
Ranj
# 2  
Old 12-09-2009
hello
have you registered the service in /etc/services
# 3  
Old 12-09-2009
Not registered
No Gaurav.

The opmn service is not registered in both the servers.

-Ranj
# 4  
Old 12-09-2009
I believe you'll need to restart the opmn managed processes in any case.

I suppose that the public interface wasn't up during the installation process.

You can try something like this (UNTESTED, use at your own risk!):

Code:
opmnctl  stopall

Modify/add the network interface in opmn.xml

Code:
$ORACLE_HOME/opmn/conf/opmn.xml

like this:

Code:
< ipaddr  remote="172.16.11.x" request="172.16.11.x; 10.10.1.x"/ >

By the way, what's the current value of ipaddr remote?

Be aware of the following bug:

Note:462716.1 Using Two IP Addresses in Request Section of opmn.xml Gives Bad OPMN server host address' Error

Code:
opmnctl start

Update the configuration:

Code:
opmnctl  reload
opmnctl startall
$ORACLE_HOME/dcm/bin/dcmctl  updateConfig -ct opmn


Me personally, I would try to add the network interface via the application control web interface (sorry for not being specific, but I don't remember the exact properties page).
# 5  
Old 12-09-2009
hello
can you check to see if there are iptables rules preventing other hosts on that server.
Its kinda strange that the same server would listening on localhost would not accept connections from other hosts.
also check if eth[n] (whatever iface) is up .
Last edited by gaurav1086; 12-09-2009 at 10:56 AM..
# 6  
Old 12-10-2009
All set up fine
Hi Gaurav,

There are no rules in iptables and the interface is also up.
Code:
[root@shk-oratestintegration01 ~]# /sbin/iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
[root@shk-oratestintegration01 ~]# /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:16:3E:3A:22:1E
          inet addr:192.168.1.115  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::216:3eff:fe3a:221e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11788401 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10866286 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1585596831 (1.4 GiB)  TX bytes:6260261128 (5.8 GiB)
          Interrupt:185 Base address:0xe000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:118015 errors:0 dropped:0 overruns:0 frame:0
          TX packets:118015 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:40417040 (38.5 MiB)  TX bytes:40417040 (38.5 MiB)

I checked my /etc/hosts file and it has entry only for the local host. Could that be a problem?
# 7  
Old 12-10-2009
hello
well everything seems to be fine.
no /etc/hosts only contain the domain names aliases for ip addresses . Its like a cache for skipping the resolving of DNS servers. So there's nothing wrong with that.
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