warning: module has the same name as its containing module
  --> src/plugins/location/remotehttp/mod.rs:16:1
   |
16 | pub mod remotehttp;
   | ^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception

warning: unneeded `return` statement
  --> src/plugins/location/local/local.rs:60:9
   |
60 |         return self.loc_cache.clone();
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
   |
60 -         return self.loc_cache.clone();
60 +         self.loc_cache.clone()
   |

warning: module has the same name as its containing module
  --> src/plugins/location/local/mod.rs:16:1
   |
16 | pub mod local;
   | ^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception

warning: returning the result of a `let` binding from a block
   --> src/plugins/loadbalance/roundrobin/roundrobin.rs:158:9
    |
154 | /         let cur_weight = self.cur_weight.fetch_add(
155 | |             self.weight.load(std::sync::atomic::Ordering::Relaxed),
156 | |             std::sync::atomic::Ordering::Relaxed,
157 | |         );
    | |__________- unnecessary `let` binding
158 |           cur_weight
    |           ^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
help: return the expression directly
    |
154 ~         
155 ~         self.cur_weight.fetch_add(
156 +             self.weight.load(std::sync::atomic::Ordering::Relaxed),
157 +             std::sync::atomic::Ordering::Relaxed,
158 +         )
    |

warning: you seem to use `.enumerate()` and immediately discard the index
  --> src/plugins/loadbalance/roundrobin/roundrobin.rs:96:25
   |
96 |         for (_, ins) in instances.instances.iter().enumerate() {
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_enumerate_index
help: remove the `.enumerate()` call
   |
96 |         for ins in instances.instances.iter() {
   |             ~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~

warning: casting to the same type is unnecessary (`u32` -> `u32`)
  --> src/plugins/loadbalance/roundrobin/roundrobin.rs:73:72
   |
73 | ...                   .or_insert_with(|| WeightedRoundRobin::new(instance.weight as u32));
   |                                                                  ^^^^^^^^^^^^^^^^^^^^^^ help: try: `instance.weight`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
   = note: `#[warn(clippy::unnecessary_cast)]` on by default

warning: module has the same name as its containing module
  --> src/plugins/loadbalance/roundrobin/mod.rs:16:1
   |
16 | pub mod roundrobin;
   | ^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception

warning: module has the same name as its containing module
  --> src/plugins/loadbalance/ringhash/mod.rs:16:1
   |
16 | pub mod ringhash;
   | ^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception

warning: module has the same name as its containing module
  --> src/plugins/loadbalance/random/mod.rs:16:1
   |
16 | pub mod random;
   | ^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception

warning: unneeded late initialization
   --> src/plugins/filter/configcrypto/crypto.rs:166:9
    |
166 |         let data_key: String;
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
    = note: `#[warn(clippy::needless_late_init)]` on by default
help: move the declaration `data_key` here and remove the assignments from the `match` arms
    |
166 ~         
167 ~         let data_key: String = match encrypt_data_key {
168 |             Ok(key) => {
169 ~                 key
170 |             }
...
178 |                     .unwrap();
179 ~                 String::from_utf8(u8_slice).unwrap()
180 |             }
181 ~         };
    |

warning: very complex type used. Consider factoring parts into `type` definitions
   --> src/plugins/filter/configcrypto/crypto.rs:108:25
    |
108 |       pub fn builder() -> (
    |  _________________________^
109 | |         fn(serde_yaml::Value) -> Result<Box<dyn DiscoverFilter>, PolarisError>,
110 | |         String,
111 | |     ) {
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity

warning: you seem to use `.enumerate()` and immediately discard the index
  --> src/plugins/filter/configcrypto/crypto.rs:70:20
   |
70 |     for (_k, v) in conf.entries.iter().enumerate() {
   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_enumerate_index
help: remove the `.enumerate()` call
   |
70 |     for v in conf.entries.iter() {
   |         ~    ~~~~~~~~~~~~~~~~~~~

warning: returning the result of a `let` binding from a block
   --> src/plugins/connector/grpc/manager.rs:465:9
    |
464 |         let addr = self.endpoint.format_address();
    |         ------------------------------------------ unnecessary `let` binding
465 |         addr
    |         ^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
help: return the expression directly
    |
464 ~         
465 ~         self.endpoint.format_address()
    |

warning: unneeded `return` statement
   --> src/plugins/connector/grpc/manager.rs:411:9
    |
411 |         return true;
    |         ^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
411 -         return true;
411 +         true
    |

warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
   --> src/plugins/connector/grpc/manager.rs:373:9
    |
373 | /         match self.sender.as_ref() {
374 | |             Some(sender) => {
375 | |                 futures::executor::block_on(async {
376 | |                     let ret = sender
...   |
390 | |             None => {}
391 | |         }
    | |_________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
help: try
    |
373 ~         if let Some(sender) = self.sender.as_ref() {
374 +             futures::executor::block_on(async {
375 +                 let ret = sender
376 +                     .send(Change::Remove(self.conn_id.format_address()))
377 +                     .await;
378 +                 match ret {
379 +                     Ok(_) => {}
380 +                     Err(err) => {
381 +                         error!(
382 +                             "notify tonic insert polaris-server node address fail: {}",
383 +                             err
384 +                         )
385 +                     }
386 +                 }
387 +             });
388 +         }
    |

warning: using `clone` on type `ClusterType` which implements the `Copy` trait
   --> src/plugins/connector/grpc/manager.rs:268:28
    |
268 |         .with_cluster_type(conn_mgr.cluster.clone())
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `conn_mgr.cluster`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy

warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
   --> src/plugins/connector/grpc/manager.rs:257:5
    |
257 | /     match conn_mgr.service_info.as_ref() {
258 | |         Some(svc_info) => {
259 | |             ns = svc_info.namespace.clone().unwrap();
260 | |             svc = svc_info.service.clone().unwrap();
261 | |         }
262 | |         None => {}
263 | |     }
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
help: try
    |
257 ~     if let Some(svc_info) = conn_mgr.service_info.as_ref() {
258 +         ns = svc_info.namespace.clone().unwrap();
259 +         svc = svc_info.service.clone().unwrap();
260 +     }
    |

warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
   --> src/plugins/connector/grpc/manager.rs:233:17
    |
233 | /                 match cur_conn {
234 | |                     Some(conn) => conn.lazy_destroy(),
235 | |                     None => {}
236 | |                 }
    | |_________________^ help: try: `if let Some(conn) = cur_conn { conn.lazy_destroy() }`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match

warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
   --> src/plugins/connector/grpc/manager.rs:207:9
    |
207 | /         match cur_conn_opt {
208 | |             Some(cur_conn) => {
209 | |                 if !cur_conn.conn_id.eq(last_conn_id) {
210 | |                     return;
...   |
214 | |             None => {}
215 | |         }
    | |_________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
    = note: `#[warn(clippy::single_match)]` on by default
help: try
    |
207 ~         if let Some(cur_conn) = cur_conn_opt {
208 +             if !cur_conn.conn_id.eq(last_conn_id) {
209 +                 return;
210 +             }
211 +             self.do_switch_client(Some(&cur_conn))
212 +         }
    |

warning: unneeded `return` statement
   --> src/plugins/connector/grpc/manager.rs:191:9
    |
191 |         return Ok(self.active_conn.clone());
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
191 -         return Ok(self.active_conn.clone());
191 +         Ok(self.active_conn.clone())
    |

warning: unneeded `return` statement
   --> src/plugins/connector/grpc/connector.rs:766:9
    |
766 |         return Ok(());
    |         ^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
766 -         return Ok(());
766 +         Ok(())
    |

warning: unneeded `return` statement
   --> src/plugins/connector/grpc/connector.rs:708:9
    |
708 |         return Ok(());
    |         ^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
708 -         return Ok(());
708 +         Ok(())
    |

warning: you seem to use `.enumerate()` and immediately discard the index
   --> src/plugins/connector/grpc/connector.rs:360:29
    |
360 |         for (_i, filter) in filters.iter().enumerate() {
    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_enumerate_index
help: remove the `.enumerate()` call
    |
360 |         for filter in filters.iter() {
    |             ~~~~~~    ~~~~~~~~~~~~~~