thinkharderdev commented on code in PR #153:
URL: https://github.com/apache/arrow-ballista/pull/153#discussion_r956123015
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ballista/rust/scheduler/src/state/task_manager.rs:
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@@ -37,16 +37,19 @@ use ballista_core::serde::{AsExecutionPlan, BallistaCodec};
use datafusion::physical_plan::ExecutionPlan;
use datafusion::prelude::SessionContext;
use datafusion_proto::logical_plan::AsLogicalPlan;
-use log::{debug, info, warn};
+#[cfg(not(test))]
+use log::info;
+use log::{debug, error, warn};
use rand::distributions::Alphanumeric;
use rand::{thread_rng, Rng};
-use std::collections::{HashMap, HashSet};
+use std::collections::HashMap;
use std::default::Default;
use std::sync::Arc;
use tokio::sync::RwLock;
use tonic::transport::Channel;
type ExecutorClients = Arc<RwLock<HashMap<String,
ExecutorGrpcClient<Channel>>>>;
+type ExecutionGraphCache = Arc<RwLock<HashMap<String,
Arc<RwLock<ExecutionGraph>>>>>;
#[derive(Clone)]
pub struct TaskManager<T: 'static + AsLogicalPlan, U: 'static +
AsExecutionPlan> {
Review Comment:
What we do is configure the scheduler endpoint in the executor to be the
kubernetes service endpoint. So this will load balance executor registrations
across the schedulers but any given scheduler should maintain a persistent
connection to only the scheduler it registered with.
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