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[Bug]: `check_intervals` will not validate correctly in certain nested txn scenarios

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### Description about the bug In the current implementation of `check_intervals` in txn request validation, it may not validate the request correctly. ```rust /// Check if puts and deletes overlap...

(Partial) Jepsen test analysis

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## Tests I partially completed Jepsen tests on Xline, which based on https://github.com/jepsen-io/etcd. Tested the following, without nemesis to produce failures: - **Register** Tests for single registers, using knossos for...

## Description In read state, after the wait for cmd ids or log index are completed, we directly read from the current storage. However, I find that if there's multiple...

## Background: As discussed in #273, we need to provide a Xline specific client SDK for Rust. While some progress has been made on the client, further refinement is required...

无网络请求的时候登录失败

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在没有其他使用网络的用户软件的情况下运行 ``` # ipgw using account 'xxxxxxxx' login failed: unknown reason ``` 任意发一个公网连接请求后就能正常登录 ``` # curl 1.1.1.1 top.self.location.href='http://202.118.1.87/index_15.html?wlanuserip=xx.xx.xx.xx&wlanacname=NS_Wifi_N18K&ssid=&nasip=202.118.0.11&snmpagentip=&mac=4a806e361ea3&t=wireless-v2-plain&url=http://1.1.1.1/&apmac=&nasid=NS_Wifi_N18K&vid=2008&port=27&nasportid=AggregatePort 1.20080000:2008-0' # ipgw using account 'xxxxxxxx' login successfully ```

refactor: xline command execution

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Depends-On: #687 #807 #673 #853 This PR refactors xline kv storage and xline command executor. Some tests will not be fixed in this PR; they will be fixed in #821....

Depends-On: #808 #858 Please briefly answer these questions: * what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?) * what changes...

feat: add mock fs for wal

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The mock filesystem implementation is used for simulation purposes. For example, we can discard unsynced data during a simulation test using this implementation. Please briefly answer these questions: * what...

feat: mock wal implementation

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To avoid specify the wal storage path in testing. Please briefly answer these questions: * what problem are you trying to solve? (or if there's no problem, what's the motivation...

[Bug]: Implement ReadIndex

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### Description about the bug When a network partition occurs, the leader in the smaller partition may not be aware that a new leader has already been elected in the...