[fix](arrow-flight-sql) Fix Arrow Flight bearer token cache evict after expired #41754
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yiguolei
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Oct 14, 2024
| return new FlightTokenDetails(); | ||
| } | ||
| }); | ||
| this.cleanupExecutor = Executors.newScheduledThreadPool(1, new CustomThreadFactory("flight-token-cleanup")); |
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我们为什么不是再register connection的时候检查一下链接是否满了，主动淘汰呢？
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不好，因为链接没满，也希望可以淘汰过期的token，
- 这里淘汰的是 flight token，也就是 arrow flight server 的登陆凭证，不是flight链接，这个 token 预期是要有过期淘汰机制的，类似账户登陆后一段时间就要重新登陆。
- 淘汰 token 会同时淘汰 flight 链接，因为如果 token 淘汰了那 flight 链接也就不会再访问了，用户 show processlist 看到 arrow flight 链接一直没有释放会有疑问。
- 默认 token 过期时间是 3天，flight/mysql 链接过期时间要更短，也就是一次登陆（拿到token）可以多次创建链接，所以不能在 flight 链接过期淘汰的同时淘汰 token。
yiguolei
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Oct 16, 2024
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…er expired (apache#41754) Guava LoadingCache expiration check is performed when the cache is accessed, not immediately when the expiration time is reached. So manually call the cleanUp method regularly to clean up expired cache items.
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…er expired (apache#41754) Guava LoadingCache expiration check is performed when the cache is accessed, not immediately when the expiration time is reached. So manually call the cleanUp method regularly to clean up expired cache items.
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…er expired (apache#41754) Guava LoadingCache expiration check is performed when the cache is accessed, not immediately when the expiration time is reached. So manually call the cleanUp method regularly to clean up expired cache items.
This was referenced Nov 18, 2024
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Guava LoadingCache expiration check is performed when the cache is accessed, not immediately when the expiration time is reached.
So manually call the cleanUp method regularly to clean up expired cache items.