Drop verbose log entries in BP when no network graph is provided

If no network graph is provided to the `BackgroundProcessor`, we
log every time the processor loop goes around (at least every
100ms, if not more) which fille up logs with useless indications
that we have no network graph.

diff --git a/lightning-background-processor/src/lib.rs b/lightning-background-processor/src/lib.rs
index ece82bcaa55a2299fd51f738050f55c52926ad78..4970c6920c53d75061824b70f68ae6af36ced1b9 100644 (file)
--- a/lightning-background-processor/src/lib.rs
+++ b/lightning-background-processor/src/lib.rs
@@ -283,8 +283,8 @@ macro_rules! define_run_body {
                        // continuing our normal cadence.
                        if last_prune_call.elapsed().as_secs() > if have_pruned { NETWORK_PRUNE_TIMER } else { FIRST_NETWORK_PRUNE_TIMER } {
                                // The network graph must not be pruned while rapid sync completion is pending
-                               log_trace!($logger, "Assessing prunability of network graph");
                                if let Some(network_graph) = $gossip_sync.prunable_network_graph() {
+                                       log_trace!($logger, "Pruning and persisting network graph.");
                                        network_graph.remove_stale_channels_and_tracking();
 
                                        if let Err(e) = $persister.persist_graph(network_graph) {
@@ -293,8 +293,6 @@ macro_rules! define_run_body {
 
                                        last_prune_call = Instant::now();
                                        have_pruned = true;
-                               } else {
-                                       log_trace!($logger, "Not pruning network graph, either due to pending rapid gossip sync or absence of a prunable graph.");
                                }
                        }
 
@@ -1072,10 +1070,11 @@ mod tests {
 
                loop {
                        let log_entries = nodes[0].logger.lines.lock().unwrap();
-                       let expected_log_a = "Assessing prunability of network graph".to_string();
-                       let expected_log_b = "Not pruning network graph, either due to pending rapid gossip sync or absence of a prunable graph.".to_string();
-                       if log_entries.get(&("lightning_background_processor".to_string(), expected_log_a)).is_some() &&
-                               log_entries.get(&("lightning_background_processor".to_string(), expected_log_b)).is_some() {
+                       let loop_counter = "Calling ChannelManager's timer_tick_occurred".to_string();
+                       if *log_entries.get(&("lightning_background_processor".to_string(), loop_counter))
+                               .unwrap_or(&0) > 1
+                       {
+                               // Wait until the loop has gone around at least twice.
                                break
                        }
                }