ResponseError: NOWRITE You can't write against a non-write redis

[blindspoter]

Hi:

I encountered a problem that returned this error:

/env/lib/python2.7/site-packages/twisted/internet/defer.py\", line 577, in _runCallbacks"}
current.result = callback(current.result, *args, **kw)"}
/env/lib/python2.7/site-packages/txredisapi.py\", line 463, in handle_reply"}
{"":"    raise r"}
{"":"txredisapi.ResponseError: NOWRITE You can't write against a non-write redis."}

and I use txredisapi.ConnectionPool to build a connection pool.

The redis is a sharding cluster，master sometimes will encounter the hardware failure，and cause the master-slave switching. The problem is that the master-slave switching will cause the cluster 30S to be read-only.，so this error occurs.

I have checked the code, the error raise from:

    @staticmethod
    def handle_reply(r):
        if isinstance(r, Exception):
            raise r
        return r

My proplem is how can i handle this error？disconnect the current connection and reconnect it? or disconnect all the connections from pool and recreate the pool?

[IlyaSkriblovsky]

Sorry, but txredisapi has no support for Redis Cluster yet. And I'm personally haven't used Cluster too.
So unfortunately, I can't help you here.

The cited code from handle_reply is just a common dispatcher all protocol errors are raised from.

Seems like the problem is that Redis node you are issuing write to is read-only. Probably txredisapi should be able to discover new master node, but for now it is only implemented for Redis Sentinel, but not for Redis Cluster.