在 StackExchange.Redis 中满足所有条件时事务失败

Question

我在集群 ASP.Net Core 服务器上使用 Stackexchange.Redis，但在处理事务时遇到了一些麻烦。

以下代码应该从两个散列“HashA”和“HashB”中删除键为“hashItemID”的字段，但前提是它同时存在于两个散列中：

var hashAKey = "HashA";
var hashBKey = "HashB";
var id = "hashItemID";

var tran = redis.Database.CreateTransaction();

// Only delete the item if it exists in both hashes
var hashBCondition = tran.AddCondition(Condition.HashExists(hashBKey, id));
var hashACondition = tran.AddCondition(Condition.HashExists(hashAKey, id));

tran.HashDeleteAsync(hashBKey, id);
tran.HashDeleteAsync(hashAKey, id);

var deleted = await tran.ExecuteAsync();

if (!deleted)
{
    logger.LogWarning("Failed to delete '{ID}'. HashAResult: {A}, HashBResult: {B}", id, hashACondition.WasSatisfied, hashBCondition.WasSatisfied);
}

有时，此代码会失败并显示日志：

Failed to delete 'hashItemID'. HashAResult: True, HashBResult: True

我的印象是交易只有在不满足条件的情况下才会失败，这是真的吗？

查看网络和性能指标，没有可能导致此问题的超时或高内存使用率。

Answer 1

由于声誉限制，我无法添加评论，您可以尝试以下方法，看看它是否适合您：

var hashAKey = "HashA";
var hashBKey = "HashB";
var id = "hashItemID";

var tran = redis.Database.CreateTransaction();

// Only delete the item if it exists in both hashes
var hashBCondition = tran.AddCondition(Condition.HashExists(hashBKey, id));
var hashACondition = tran.AddCondition(Condition.HashExists(hashAKey, id));

tran.HashDeleteAsync(hashBKey, id);
tran.HashDeleteAsync(hashAKey, id);

bool deleted = await tran.ExecuteAsync();

if (!deleted)
{
    logger.LogWarning("Failed to delete '{ID}'. HashAResult: {A}, HashBResult: {B}", id, hashACondition.WasSatisfied, hashBCondition.WasSatisfied);
}

使用bool dead代替 vardeleted