"ERR MULTI calls can not be nested" when using rbatch in cluster mode

[Jacsonliu]

when i used rbatch to execute a batch of orders in cluster mode just like this :
RBatch rBatch = getRedisson().createBatch(batchOptions); rBatch.getSetCache("", LongCodec.INSTANCE).addAsync(packId, 3, TimeUnit.DAYS); rBatch.getTopic("").publishAsync(packId); rBatch.execute();

these orders should've been sent to different redis cluster ,as the redis keys that i used belong to different slots。
one of the orders was executed normally and the other one redis recieved looks like this:

the second redis cluster printed double "MULTI" orders，and returned an errror "ERR MULTI calls can not be nested"

reverting the version of redisson to V3.19.3 will solve the problem.

[Jacsonliu]

this "for" loop may be the cause of this issue， cuz every batch of command would be add "multi" and "exec" for twice before sending to redis.
@mrniko

[mrniko]

Let me check that