Hi Enrico, Thanks for your response! I will try to provide the code fix as soon as possible!
Best wishes, Yang On 2022/12/24 12:31:14 Enrico Olivelli wrote: > Yang, > Thanks for your report > > > Il Mar 13 Dic 2022, 18:16 Yang Sirius <al...@outlook.com> ha > scritto: > > > Hi everyone! > > > > Recently we discovered two issues in the ZooKeeper’s latest versions that > > might cause data inconsistency or committed data loss. Details and analysis > > of the issues are presented on JIRA: > > > > > > - ZOOKEEPER-4643 <https://issues.apache.org/jira/browse/ZOOKEEPER-4643> : > > Committed txns may be improperly truncated if follower crashes right > > after updating currentEpoch but before persisting txns to disk. > > - ZOOKEEPER-4646 <https://issues.apache.org/jira/browse/ZOOKEEPER-4646> > > : Committed txns may still be lost if followers crash after replying > > ACK-LD but before writing txns to disk. (This issue is related to the fix > > of ZOOKEEPER-3911 > > <https://issues.apache.org/jira/browse/ZOOKEEPER-3911>) > > > > > > The issues seem to be critical since they lead to data loss or > > inconsistency, which violate the properties that ZAB is supposed to > > satisfy. I wonder whether the bugs should get a fix since data consistency > > is of prime importance of ZooKeeper. If so, I will try to fix the code > > together with further testing and verification techniques. > > > > Help is always welcome! > > I personally don't have time to investigate and code a fix, but I will be > happy to review your work > > Thank you very much > > Sharing problems and solutions is fundamental for an OSS community like > Apache ZooKeeper > > Cheers > Enrico > > > > > Thanks! > > > > Attached are example traces of these two issues that have been generated > > in multiple versions such as 3.8.0 & 3.7.1. (The traces are also provided > > on JIRA.) > > Trace-ZK-4643: > > Trace-ZK-4646: > > >
