[jboss-jira] [JBoss JIRA] Closed: (JBAS-5706) Default session metadata replication too infrequent

[ http://jira.jboss.com/jira/browse/JBAS-5706?page=all ] Brian Stansberry closed JBAS-5706. ---------------------------------- Resolution: Done This has been fixed by changing default maximum interval between requests, in seconds, after which a request will trigger replication of the session's timestamp and other metadata regardless of whether the request has otherwise made the session dirty. Previously this was hardcoded at 80% of the session's expiration time (i.e. what would be returned by HttpSession.getMaxInactiveInterval()). Now the default is 60 seconds, and the value has been made configurable. The server-wide default for this value can be changed by adding an attribute like the following to the server/.../deploy/jboss-web.deployer/META-INF/jboss-service.xml file: <attribute name="MaxUnreplicatedInterval">30</attribute> Following is a description of the meaning of the attribute: "Clustering only: Determines the maximum interval between requests, in seconds, after which a request will trigger replication of the session's timestamp and other metadata regardless of whether the request has otherwise made the session dirty. Such replication ensures that other nodes in the cluster are aware of the most recent value for the session's timestamp and won't incorrectly expire an unreplicated session upon failover. It also results in correct values for HttpSession.getLastAccessedTime() calls following failover. The cost of this metadata replication depends on the configured replication-granularity. With <code>SESSION</code>, the session's attribute map is replicated along with the metadata, so it can be fairly costly. With other granularities, the metadata object is replicated separately from the attributes and only contains a String, and a few longs, ints and booleans. A value of 0 means the metadata will be replicated whenever the session is accessed. A value of -1 means the metadata will be replicated only if some other activity during the request (e.g. modifying an attribute) has resulted in other replication work involving the session. A positive value greater than the HttpSession.getMaxInactiveInterval() value will be treated as a likely misconfiguration and converted to 0; i.e. replicate the metadata on every request. Default value if unconfigured is 60 seconds." -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira