Hi Alex,
The interceptor business comes from the GORDA API project. This should
allow different replication algorithms to be plugged into Sequoia. In
practice, there is nothing really available for that, so the
interceptors are just dummy functions.
I just checked the code for Sequoia 2.10.10 and it looks like the
interceptor code does not handle cases where no interceptor can be
initialized. Please file a new JIRA entry with the description of the
problem, the code should be fixed to not crash ungracefully like you
experienced.
Which version of Sequoia are you using?
Did you upgrade from a previous version?
Thanks for your feedback,
Emmanuel
I have a question about this error:
ERROR 2009-03-27 13:34:27,671 [RecoverThread for backend DBB]
controller.recoverylog.RecoverThread.error - Recovery process failed
to replay: request Autocommit StatementExecuteUpdateTask
281474976710657 (INSERT INTO tb_test (col_id, col_remark4, col_type)
VALUES (?, ?, ?)/<!%S|003|!%><!%S|I am string|!%><!%I|100|!%>)
(Backend VDB - BackendWorkerThread for backend 'configDBB57' with
RAIDb level:1 failed (null))
After that I have added some log in the code, below is the error
message after I added the log.
21:29:38,351 DEBUG group.bottom.GroupBottomSession Sending message
(isSend=false) org.continuent.appia.protocols.group.suspect.al...@1013892
21:29:38,413 INFO loadbalancer.tasks.AbstractTask 111e.getMessage(): null
java.lang.NullPointerException
at
org.continuent.sequoia.controller.interceptors.InterceptorManager.invokeBackendRequestInterceptors(InterceptorManager.java:148)
at
org.continuent.sequoia.controller.interceptors.impl.InterceptorManagerAdapter.invokeBackendRequestInterceptors(InterceptorManagerAdapter.java:107)
at
org.continuent.sequoia.controller.backend.DatabaseBackend.transformQuery(DatabaseBackend.java:2430)
at
org.continuent.sequoia.controller.loadbalancer.AbstractLoadBalancer.executeStatementExecuteUpdateOnBackend(AbstractLoadBalancer.java:985)
at
org.continuent.sequoia.controller.loadbalancer.tasks.StatementExecuteUpdateTask.executeInAutoCommit(StatementExecuteUpdateTask.java:224)
at
org.continuent.sequoia.controller.loadbalancer.tasks.StatementExecuteUpdateTask.executeTask(StatementExecuteUpdateTask.java:116)
at
org.continuent.sequoia.controller.loadbalancer.tasks.AbstractTask.execute(AbstractTask.java:143)
at
org.continuent.sequoia.controller.loadbalancer.BackendWorkerThread.run(BackendWorkerThread.java:197)
Finally I found out the reason is “backendRequestInterceptors” is null.
“backendRequestInterceptors” is configured by
controller_default.properties
My question is what is the meaning about “backend.interceptors” how to
configure it.
I really appreciate for your help.
Thanks
Alex
--
Emmanuel Cecchet
FTO @ Frog Thinker
Open Source Development & Consulting
--
Web: http://www.frogthinker.org
email: m...@frogthinker.org
Skype: emmanuel_cecchet
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