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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2022/04/22 02:06:33 UTC
[GitHub] [rocketmq] LittleBoy18 opened a new issue, #4191: DLedger集群是否会发生消息丢失的情况
LittleBoy18 opened a new issue, #4191:
URL: https://github.com/apache/rocketmq/issues/4191
所有从节点都没有和master节点同步完成，此时master节点宕机，选举出来的从节点应该会有消息丢失的情况吧？
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[GitHub] [rocketmq] hzh0425 commented on issue #4191: Will message loss occur in the dledger cluster
Posted by GitBox <gi...@apache.org>.
hzh0425 commented on issue #4191:
URL: https://github.com/apache/rocketmq/issues/4191#issuecomment-1106441134
Dledger cluster 是 raft 协议的, 选举出来的 leader 一定会包含所有 committed 的消息.
你说的情况可能出现在: Leader 刚 append 一些消息, 还没来得及同步到 followers, 就 shutdown 了.
这种情况下, 这些没有被 committed 的消息, 即使丢失了也没有关系.
因为这些没有 committed 的消息在 leader shutdown 之前不会被消费者消费到.
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[GitHub] [rocketmq] RongtongJin closed issue #4191: Will message loss occur in the dledger cluster
Posted by GitBox <gi...@apache.org>.
RongtongJin closed issue #4191: Will message loss occur in the dledger cluster
URL: https://github.com/apache/rocketmq/issues/4191
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[GitHub] [rocketmq] RongtongJin commented on issue #4191: DLedger集群是否会发生消息丢失的情况
Posted by GitBox <gi...@apache.org>.
RongtongJin commented on issue #4191:
URL: https://github.com/apache/rocketmq/issues/4191#issuecomment-1105936872
不会的，DLedger模式遵从raft协议，选出来从节点一定有committed的所有消息
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