liquidator: forcefully exit process if snapshot job die (#924)

* liquidator: forcefully exit process if snapshot job die

* client: return snapshot_job join handle so it can be watched for early unexpected exit

(cherry picked from commit 2520c7d)

bin/cli/src/save_snapshot.rs

@@ -66,7 +66,7 @@ pub async fn save_snapshot(
     .await?;
 
     // Getting solana account snapshots via jsonrpc
-    snapshot_source::start(
+    let snapshot_job = snapshot_source::start(
         snapshot_source::Config {
             rpc_http_url: rpc_url.clone(),
             mango_group,
@@ -78,6 +78,11 @@ pub async fn save_snapshot(
         oracles_and_vaults,
         account_update_sender,
     );
+    tokio::spawn(async move {
+        let res = snapshot_job.await;
+        tracing::error!("Snapshot job exited, terminating process.. ({:?})", res);
+        std::process::exit(-1);
+    });
 
     let mut chain_data = chain_data::ChainData::new();
 

bin/liquidator/src/main.rs

@@ -155,7 +155,7 @@ async fn main() -> anyhow::Result<()> {
 
     // Getting solana account snapshots via jsonrpc
     // FUTURE: of what to fetch a snapshot - should probably take as an input
-    snapshot_source::start(
+    let snapshot_job = snapshot_source::start(
         snapshot_source::Config {
             rpc_http_url: rpc_url.clone(),
             mango_group,
@@ -457,6 +457,7 @@ async fn main() -> anyhow::Result<()> {
         liquidation_job,
         token_swap_info_job,
         check_changes_for_abort_job,
+        snapshot_job,
     ]
     .into_iter()
     .chain(prio_jobs.into_iter())

bin/service-mango-health/src/main.rs

@@ -64,7 +64,8 @@ async fn main() -> anyhow::Result<()> {
     )
     .await?;
 
-    let mut jobs = vec![exit_processor.job, data_processor.job, health_processor.job];
+    let mut jobs = vec![exit_processor.job, health_processor.job];
+    jobs.extend(data_processor.jobs);
 
     if let Some(logger) = logger {
         jobs.push(logger.job)

bin/service-mango-health/src/processors/data.rs

@@ -22,7 +22,7 @@ use tracing::warn;
 
 pub struct DataProcessor {
     pub channel: tokio::sync::broadcast::Sender<DataEvent>,
-    pub job: JoinHandle<()>,
+    pub jobs: Vec<JoinHandle<()>>,
     pub chain_data: Arc<RwLock<chain_data::ChainData>>,
 }
 
@@ -52,7 +52,7 @@ impl DataProcessor {
     ) -> anyhow::Result<DataProcessor> {
         let mut retry_counter = RetryCounter::new(2);
         let mango_group = Pubkey::from_str(&configuration.mango_group)?;
-        let mango_stream =
+        let (mango_stream, snapshot_job) =
             fail_or_retry!(retry_counter, Self::init_mango_source(configuration).await)?;
         let (sender, _) = tokio::sync::broadcast::channel(8192);
         let sender_clone = sender.clone();
@@ -98,7 +98,7 @@ impl DataProcessor {
 
         let result = DataProcessor {
             channel: sender,
-            job,
+            jobs: vec![job, snapshot_job],
             chain_data,
         };
 
@@ -147,7 +147,9 @@ impl DataProcessor {
         return Some(Other);
     }
 
-    async fn init_mango_source(configuration: &Configuration) -> anyhow::Result<Receiver<Message>> {
+    async fn init_mango_source(
+        configuration: &Configuration,
+    ) -> anyhow::Result<(Receiver<Message>, JoinHandle<()>)> {
         //
         // Client setup
         //
@@ -192,7 +194,7 @@ impl DataProcessor {
 
         // Getting solana account snapshots via jsonrpc
         // FUTURE: of what to fetch a snapshot - should probably take as an input
-        snapshot_source::start(
+        let snapshot_job = snapshot_source::start(
             snapshot_source::Config {
                 rpc_http_url: configuration.rpc_http_url.clone(),
                 mango_group,
@@ -205,6 +207,6 @@ impl DataProcessor {
             account_update_sender,
         );
 
-        Ok(account_update_receiver)
+        Ok((account_update_receiver, snapshot_job))
     }
 }

bin/settler/src/main.rs

@@ -178,7 +178,7 @@ async fn main() -> anyhow::Result<()> {
 
     // Getting solana account snapshots via jsonrpc
     // FUTURE: of what to fetch a snapshot - should probably take as an input
-    snapshot_source::start(
+    let snapshot_job = snapshot_source::start(
         snapshot_source::Config {
             rpc_http_url: rpc_url.clone(),
             mango_group,
@@ -353,6 +353,7 @@ async fn main() -> anyhow::Result<()> {
 
     use futures::StreamExt;
     let mut jobs: futures::stream::FuturesUnordered<_> = vec![
+        snapshot_job,
         data_job,
         settle_job,
         tcs_start_job,

lib/client/src/snapshot_source.rs

@@ -16,6 +16,7 @@ use solana_rpc::rpc::rpc_accounts::AccountsDataClient;
 use solana_rpc::rpc::rpc_accounts_scan::AccountsScanClient;
 use std::str::FromStr;
 use std::time::Duration;
+use tokio::task::JoinHandle;
 use tokio::time;
 use tracing::*;
 
@@ -221,11 +222,15 @@ async fn feed_snapshots(
     Ok(())
 }
 
-pub fn start(config: Config, mango_oracles: Vec<Pubkey>, sender: async_channel::Sender<Message>) {
+pub fn start(
+    config: Config,
+    mango_oracles: Vec<Pubkey>,
+    sender: async_channel::Sender<Message>,
+) -> JoinHandle<()> {
     let mut poll_wait_first_snapshot = crate::delay_interval(time::Duration::from_secs(2));
     let mut interval_between_snapshots = crate::delay_interval(config.snapshot_interval);
 
-    tokio::spawn(async move {
+    let snapshot_job = tokio::spawn(async move {
         let rpc_client = http::connect_with_options::<MinimalClient>(&config.rpc_http_url, true)
             .await
             .expect("always Ok");
@@ -258,4 +263,6 @@ pub fn start(config: Config, mango_oracles: Vec<Pubkey>, sender: async_channel::
             };
         }
     });
+
+    snapshot_job
 }