HTTP Session failover .. how monitor

[Former Member]

Hi guys

I have test JavaEE application deployed in SAP NW AS JAVA 7.4 via telnet

I enable http failover on_request  in config tool (screen1)

In META-INF folder i put application-j2ee-engine.xml

<application-j2ee-engine xsi:noNamespaceSchemaLocation="application-j2ee-engine.xsd"><fail-over-enable mode="on_request" delta="on" xsi:type="fail-over-enableType_enable"/></application-j2ee-engine>

And add parameter icm/HTTP/J2EE/force_server_switch = 1 in J00 and SCS profiles

After that i restart SAP NW instance

My JavaEE app shows me time when session is created.

How i testing session failover:

1. undeploy test JavaEE app

2. deploy test JavaEE app

Refresh browser but session created time is new.

This means that the old session is not saved ((

I try monitor  failover from SAP Managment Console in Sessions.

When undeploy session is gone . After that deploy, refresh browser and session is become .

Id Hash parameter the  same before undeploy and after deploy.

How understand my session failover is working ? Stored in file? Where this files is placed on filesystem?

[Former Member · Accepted solution]

Session failover is used to move sessions from one server node to another in case the server node currently managing the session fails. You need to have more than one server node to test the failover, undeploying/redeploying the application is not a proper test. The persistency of the session depends on parameter session.persistent.storage.

[Former Member · Accepted solution]

Hi Samuli

Thanks for your answer

If I understand you correctly to enable for me http session failover need  two Netweaver AS JAVA .

On single standalone instance i cant have http session failover for example storing session on filesystem  or DB??

[Former Member · Accepted solution]

You can have several server nodes within a single AS JAVA instance. On a single AS JAVA instance you can use all 3 options: shared memory, database or file. Across multiple AS JAVAs you should use database. See the documentation for details.

[Former Member · Accepted solution]

I add server process to instance. And now SAP MC shows me old sessions . Tell please how can i recover this old session to work with them.