diff --git a/core/src/locktower.rs b/core/src/locktower.rs
index 45bff8eb27..31df4474ce 100644
--- a/core/src/locktower.rs
+++ b/core/src/locktower.rs
@@ -7,8 +7,8 @@ use solana_sdk::pubkey::Pubkey;
 use solana_vote_api::vote_instruction::Vote;
 use solana_vote_api::vote_state::{Lockout, VoteState, MAX_LOCKOUT_HISTORY};
 
-const VOTE_THRESHOLD_DEPTH: usize = 8;
-const VOTE_THRESHOLD_SIZE: f64 = 2f64 / 3f64;
+pub const VOTE_THRESHOLD_DEPTH: usize = 8;
+pub const VOTE_THRESHOLD_SIZE: f64 = 2f64 / 3f64;
 
 #[derive(Default)]
 pub struct EpochStakes {
@@ -191,13 +191,13 @@ impl Locktower {
                 continue;
             }
             if !descendants[&vote.slot].contains(&slot) {
-                return false;
+                return true;
             }
         }
         if let Some(root) = lockouts.root_slot {
-            descendants[&root].contains(&slot)
+            !descendants[&root].contains(&slot)
         } else {
-            true
+            false
         }
     }
 
@@ -385,27 +385,27 @@ mod test {
     fn test_is_locked_out_empty() {
         let locktower = Locktower::new(EpochStakes::new_for_tests(2), 0, 0.67);
         let descendants = HashMap::new();
-        assert!(locktower.is_locked_out(0, &descendants));
+        assert!(!locktower.is_locked_out(0, &descendants));
     }
 
     #[test]
-    fn test_is_locked_out_root_slot_child() {
+    fn test_is_locked_out_root_slot_child_pass() {
         let mut locktower = Locktower::new(EpochStakes::new_for_tests(2), 0, 0.67);
         let descendants = vec![(0, vec![1].into_iter().collect())]
             .into_iter()
             .collect();
         locktower.lockouts.root_slot = Some(0);
-        assert!(locktower.is_locked_out(1, &descendants));
+        assert!(!locktower.is_locked_out(1, &descendants));
     }
 
     #[test]
-    fn test_is_locked_out_root_slot_sibling() {
+    fn test_is_locked_out_root_slot_sibling_fail() {
         let mut locktower = Locktower::new(EpochStakes::new_for_tests(2), 0, 0.67);
         let descendants = vec![(0, vec![1].into_iter().collect())]
             .into_iter()
             .collect();
         locktower.lockouts.root_slot = Some(0);
-        assert!(!locktower.is_locked_out(2, &descendants));
+        assert!(locktower.is_locked_out(2, &descendants));
     }
 
     #[test]
@@ -424,7 +424,7 @@ mod test {
             .collect();
         locktower.record_vote(0);
         locktower.record_vote(1);
-        assert!(!locktower.is_locked_out(0, &descendants));
+        assert!(locktower.is_locked_out(0, &descendants));
     }
 
     #[test]
@@ -434,7 +434,7 @@ mod test {
             .into_iter()
             .collect();
         locktower.record_vote(0);
-        assert!(locktower.is_locked_out(1, &descendants));
+        assert!(!locktower.is_locked_out(1, &descendants));
     }
 
     #[test]
@@ -449,7 +449,7 @@ mod test {
         .collect();
         locktower.record_vote(0);
         locktower.record_vote(1);
-        assert!(!locktower.is_locked_out(2, &descendants));
+        assert!(locktower.is_locked_out(2, &descendants));
     }
 
     #[test]
@@ -460,7 +460,7 @@ mod test {
             .collect();
         locktower.record_vote(0);
         locktower.record_vote(1);
-        assert!(locktower.is_locked_out(4, &descendants));
+        assert!(!locktower.is_locked_out(4, &descendants));
         locktower.record_vote(4);
         assert_eq!(locktower.lockouts.votes[0].slot, 0);
         assert_eq!(locktower.lockouts.votes[0].confirmation_count, 2);
diff --git a/core/src/replay_stage.rs b/core/src/replay_stage.rs
index d7ebc1dc08..e88f34aeb7 100644
--- a/core/src/replay_stage.rs
+++ b/core/src/replay_stage.rs
@@ -130,11 +130,25 @@ impl ReplayStage {
                     let descendants = bank_forks.read().unwrap().descendants();
                     let ancestors = bank_forks.read().unwrap().ancestors();
                     let frozen_banks = bank_forks.read().unwrap().frozen_banks();
+
+                    trace!("frozen_banks {}", frozen_banks.len());
                     let mut votable: Vec<(u128, Arc<Bank>)> = frozen_banks
                         .values()
-                        .filter(|b| b.is_votable())
-                        .filter(|b| !locktower.has_voted(b.slot()))
-                        .filter(|b| !locktower.is_locked_out(b.slot(), &descendants))
+                        .filter(|b| {
+                            let is_votable = b.is_votable();
+                            trace!("bank is votable: {} {}", b.slot(), is_votable);
+                            is_votable
+                        })
+                        .filter(|b| {
+                            let has_voted = locktower.has_voted(b.slot());
+                            trace!("bank is has_voted: {} {}", b.slot(), has_voted);
+                            !has_voted
+                        })
+                        .filter(|b| {
+                            let is_locked_out = locktower.is_locked_out(b.slot(), &descendants);
+                            trace!("bank is is_locked_out: {} {}", b.slot(), is_locked_out);
+                            !is_locked_out
+                        })
                         .map(|bank| {
                             (
                                 bank,
@@ -146,7 +160,10 @@ impl ReplayStage {
                             )
                         })
                         .filter(|(b, stake_lockouts)| {
-                            locktower.check_vote_stake_threshold(b.slot(), &stake_lockouts)
+                            let vote_threshold =
+                                locktower.check_vote_stake_threshold(b.slot(), &stake_lockouts);
+                            trace!("bank vote_threshold: {} {}", b.slot(), vote_threshold);
+                            vote_threshold
                         })
                         .map(|(b, stake_lockouts)| {
                             (locktower.calculate_weight(&stake_lockouts), b.clone())
@@ -154,8 +171,18 @@ impl ReplayStage {
                         .collect();
 
                     votable.sort_by_key(|b| b.0);
+                    trace!("votable_banks {}", votable.len());
                     let ms = timing::duration_as_ms(&locktower_start.elapsed());
-                    info!("@{:?} locktower duration: {:?}", timing::timestamp(), ms,);
+                    if !votable.is_empty() {
+                        let weights: Vec<u128> = votable.iter().map(|x| x.0).collect();
+                        info!(
+                            "@{:?} locktower duration: {:?} len: {} weights: {:?}",
+                            timing::timestamp(),
+                            ms,
+                            votable.len(),
+                            weights
+                        );
+                    }
                     inc_new_counter_info!("replay_stage-locktower_duration", ms as usize);
 
                     if let Some((_, bank)) = votable.last() {