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Avoid panic if no rpc peers exist

This commit is contained in:
Michael Vines 2019-06-17 15:44:19 -07:00
parent b44d8c394e
commit feeaad619a
1 changed files with 40 additions and 36 deletions
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76
core/src/replicator.rs
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@ -549,47 +549,51 @@ impl Replicator {
previous_blockhash: &Hash,
) -> result::Result<(Hash, u64), Error> {
for _ in 0..10 {
let rpc_client = {
let rpc_peers = {
let cluster_info = cluster_info.read().unwrap();
let rpc_peers = cluster_info.rpc_peers();
debug!("rpc peers: {:?}", rpc_peers);
let node_index = thread_rng().gen_range(0, rpc_peers.len());
RpcClient::new_socket(rpc_peers[node_index].rpc)
cluster_info.rpc_peers()
};
let response = rpc_client
.retry_make_rpc_request(&RpcRequest::GetStorageBlockhash, None, 0)
.map_err(|err| {
warn!("Error while making rpc request {:?}", err);
Error::IO(io::Error::new(ErrorKind::Other, "rpc error"))
})?;
let storage_blockhash =
serde_json::from_value::<(String)>(response).map_err(|err| {
io::Error::new(
io::ErrorKind::Other,
format!("Couldn't parse response: {:?}", err),
)
})?;
let storage_blockhash = storage_blockhash.parse().map_err(|err| {
io::Error::new(
io::ErrorKind::Other,
format!(
"Blockhash parse failure: {:?} on {:?}",
err, storage_blockhash
),
)
})?;
if storage_blockhash != *previous_blockhash {
let storage_slot = rpc_client
.retry_make_rpc_request(&RpcRequest::GetStorageSlot, None, 0)
debug!("rpc peers: {:?}", rpc_peers);
if !rpc_peers.is_empty() {
let rpc_client = {
let node_index = thread_rng().gen_range(0, rpc_peers.len());
RpcClient::new_socket(rpc_peers[node_index].rpc)
};
let response = rpc_client
.retry_make_rpc_request(&RpcRequest::GetStorageBlockhash, None, 0)
.map_err(|err| {
warn!("Error while making rpc request {:?}", err);
Error::IO(io::Error::new(ErrorKind::Other, "rpc error"))
})?
.as_u64()
.unwrap();
info!("storage slot: {}", storage_slot);
if get_segment_from_slot(storage_slot) != 0 {
return Ok((storage_blockhash, storage_slot));
})?;
let storage_blockhash =
serde_json::from_value::<(String)>(response).map_err(|err| {
io::Error::new(
io::ErrorKind::Other,
format!("Couldn't parse response: {:?}", err),
)
})?;
let storage_blockhash = storage_blockhash.parse().map_err(|err| {
io::Error::new(
io::ErrorKind::Other,
format!(
"Blockhash parse failure: {:?} on {:?}",
err, storage_blockhash
),
)
})?;
if storage_blockhash != *previous_blockhash {
let storage_slot = rpc_client
.retry_make_rpc_request(&RpcRequest::GetStorageSlot, None, 0)
.map_err(|err| {
warn!("Error while making rpc request {:?}", err);
Error::IO(io::Error::new(ErrorKind::Other, "rpc error"))
})?
.as_u64()
.unwrap();
info!("storage slot: {}", storage_slot);
if get_segment_from_slot(storage_slot) != 0 {
return Ok((storage_blockhash, storage_slot));
}
}
}
info!("waiting for segment...");