{"id":8520,"date":"2015-09-10T03:10:35","date_gmt":"2015-09-10T07:10:35","guid":{"rendered":"http:\/\/onlineappsdba.com\/?p=8520"},"modified":"2015-09-10T03:27:32","modified_gmt":"2015-09-10T07:27:32","slug":"oracle-access-manager-on-disaster-recovery-dr-site-operation-error","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2015\/09\/10\/oracle-access-manager-on-disaster-recovery-dr-site-operation-error\/","title":{"rendered":"Oracle Access Manager on Disaster Recovery (DR) site : Operation Error"},"content":{"rendered":"

\"oracle_disaster_recovery\"<\/a><\/p>\n

Last year we launched our consulting services<\/a><\/strong> where we design<\/strong>, implement<\/strong> and support<\/strong> Oracle products. This post is from issue we encountered during failover of Oracle Access Manager<\/strong> (OAM) from Primary<\/strong>\u00a0site to Standby<\/strong>\u00a0site for one of our client.<\/p>\n

We also cover High Availability and Disaster Recovery in our Oracle Access Manager Training<\/a>\u00a0 agenda here<\/a>\u00a0<\/strong>(next batch starts on 2oth September 2015<\/span>)<\/p>\n

Setup at customer site<\/strong><\/span>: Oracle Access Manager (OAM) deployed with high availability<\/strong> in primary datacenter (assume DC1) and disaster recovery site<\/strong> in secondary datacenter (assume DC2). We used RAC database to synchronise data in database from primary site to standby site. File system on application tier (hosting OAM servers) was replicated from primary site to standby site using SAN replication (If you don’t have SAN then use O.S. utility like rsync<\/strong><\/span>) . There are few other steps for OAM DR setup that I am going to cover in another post.<\/p>\n

 <\/p>\n

Issue:<\/strong><\/span> After failover of OAM to disaster recovery site, while accessing the single sign on URL: https:\/\/sso.mycompany.com<\/span> at DR Site it was showing an error<\/p>\n

\u201cOracle Access Manager Operation Error
\n<\/span>The webgate plug-in is unable to contact any access server\u201d<\/span><\/p>\n

Cause<\/strong><\/span> : Error is self explanatory that WebGate<\/strong> (Policy Enforcement Point<\/strong>) is unable to reach OAM Server (Policy Decision Point<\/strong>) on DR site. This error could be because of number of reasons.<\/p>\n

Logs\/Errors<\/strong><\/span>\u00a0: To Find the root cause check OHS Error logs at $ORACLE_INSTANCE\/diagnostics\/logs\/OHS\/ohs1\/ohs1.log<\/span> , in my case it was showing the error as below:<\/p>\n

\u201cThe Access Gate is unable to contact any Access Servers<\/span><\/strong>\u201d<\/p>\n

[2015-09-01T10:27:12.4327+00:00] [OHS] [ERROR:32] [OHS-9999] [core.c] [client_id: 127.0.0.1] [host_id: example.com] [host_addr: HOST_IP] [tid: 139963023050496] [user: demo] [ecid:00S7] [rid: 0] [Virtual Host: main] OBWebGate_AuthnAndAuthz: The AccessGate is unable to contact any Access servers<\/span><\/p>\n

\u00a0[2015-09-01T10:27:12.4351+00:00] [OHS] [ERROR:32] [OHS-9999] [core.c] [client_id: 127.0.0.1] [host_id: example.com] [host_addr: HOST_IP] [tid: 139963023050496] [user: demo] [ecid:00S7] [rid: 0] [Virtual Host: main] Request Failed For: \/index.html, Resp code : [500]<\/span><\/p>\n

2.<\/strong> check Oblix logs (oblog.log<\/strong>) at $ORACLE_INSTANCE\/dignostics\/logs\/OHS\/ohs1\/oblog.log<\/strong> and it was showing the error as below:<\/p>\n

\u201cException thrown during WebGate Initialization<\/strong>\u201d<\/p>\n

2015\/09\/01813:56:36.38344 21825 21849 ACCESS_GATE contact INIT config.xml FATAL 0x0000182C any Access Servers. “ERROR 0x00CONFIG ERROR 0x00000505 raw codeS’ 0 21825 21852 ACCESS_GATE FATAL 0x00001520 “Exception thrown during WebGate initialization”<\/span><\/p>\n

Checks<\/strong><\/span> : For this issue, we need to check if WebGate<\/strong> is able to contact the OAM server<\/strong> on Port mentioned in primary_server_list<\/strong> of WebGate configuration file.<\/p>\n

Key File<\/strong><\/span> : OAM server details are stored in webgate configuration file (on OHS Server) at $ORACLE_INSTANCE\/config\/OHS\/ohs1\/webgate\/config\/ObAccessClient.xml<\/strong><\/p>\n

We discuss lot of other important key files for OAM server, WebLogic, OHS, WebGate in our Oracle Access Manager (OAM) Training<\/a><\/span><\/p>\n

Webgate connect to the OAM Server via OAM Proxy Port<\/strong> and in our case we Provided the OAM Proxy port with a different value 7009 other than the default port 5575<\/strong>
\nRoot Cause<\/strong><\/span> : In the file ObAccessClient.xml<\/strong> the Proxy port was changed to the default 5575 after migration to DR site because of which the WebGate was unable to contact the OAM server.<\/p>\n

 <\/p>\n

FIX:<\/span><\/strong><\/p>\n

1.<\/strong>\u00a0\u00a0 \u00a0Login to OAM\u00a0Console<\/strong> on DR site \u00a0http:\/\/comp.example.com:7001\/oamconsole<\/span>
\n2.<\/strong>\u00a0\u00a0 \u00a0Navigate to the Configuration –> Server Instances
\n3.<\/strong>\u00a0\u00a0 \u00a0Click Search
\n4.<\/strong>\u00a0\u00a0 \u00a0Click WLS_OAM1
\n5.<\/strong>\u00a0\u00a0 \u00a0Change the Proxy Port to the old value that was 7009
\n6.<\/strong>\u00a0\u00a0 \u00a0Similarly, change the Proxy Port of WLS_OAM2 (If you have two OAM nodes in DR site)
\n7.\u00a0<\/strong>\u00a0 \u00a0Save the changes
\n8.\u00a0<\/strong>\u00a0 \u00a0Copy the updated ObAccessClient.xml<\/strong> located under OAM Domain ($DOMAIN_HOME\/output\/<WEB_AGENT>) to OHS Server ($ORACLE_INSTANCE\/config\/OHS\/ohs1\/webgate)
\n9.\u00a0<\/strong>\u00a0 \u00a0Bounce the services of OAM & OHS<\/p>\n

Single sign URL: https:\/\/sso.mycompany.com<\/span> should be accessible now<\/p>\n

 <\/p>\n

If you want to learn more issues like above or wish to discuss challenges you are hitting in Oracle Access Manager Implementation, register for our Oracle Access Manager<\/strong> Training<\/strong><\/span><\/a>.<\/p>\n

We are so confident on quality and value of our trainings that We provide 100% Money back guarantee<\/strong> so in unlikely case of you being not happy after 2 sessions, just drop us a mail before third session and We’ll refund FULL money<\/span>.<\/p>\n

Did you subscribe to our YouTube Channel<\/a>\u00a0(293 already subscribed) ?<\/p>\n","protected":false},"excerpt":{"rendered":"

Last year we launched our consulting services where we design, implement and support Oracle products. This post is from issue 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