add more logging for get blocks form peers task (#3047)

* add more logging for get blocks form peers task

Signed-off-by: Stefan Pingel <stefan.pingel@consensys.net>

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/manager/task/AbstractGetHeadersFromPeerTask.java

@@ -74,16 +74,19 @@ public abstract class AbstractGetHeadersFromPeerTask
     final List<BlockHeader> headers = headersMessage.getHeaders(protocolSchedule);
     if (headers.isEmpty()) {
       // Message contains no data - nothing to do
+      LOG.debug("headers.isEmpty. Peer: {}", peer);
       return Optional.empty();
     }
     if (headers.size() > count) {
       // Too many headers - this isn't our response
+      LOG.debug("headers.size()>count. Peer: {}", peer);
       return Optional.empty();
     }
 
     final BlockHeader firstHeader = headers.get(0);
     if (!matchesFirstHeader(firstHeader)) {
       // This isn't our message - nothing to do
+      LOG.debug("!matchesFirstHeader. Peer: {}", peer);
       return Optional.empty();
     }
 
@@ -95,6 +98,7 @@ public abstract class AbstractGetHeadersFromPeerTask
       final BlockHeader header = headers.get(i);
       if (header.getNumber() != prevBlockHeader.getNumber() + expectedDelta) {
         // Skip doesn't match, this isn't our data
+        LOG.debug("header not matching the expected number. Peer: {}", peer);
         return Optional.empty();
       }
       // if headers are supposed to be sequential check if a chain is formed
@@ -103,8 +107,7 @@ public abstract class AbstractGetHeadersFromPeerTask
         final BlockHeader child = reverse ? prevBlockHeader : header;
         if (!parent.getHash().equals(child.getParentHash())) {
           LOG.debug(
-              "Sequential headers must form a chain through hashes, disconnecting peer: {}",
-              peer.toString());
+              "Sequential headers must form a chain through hashes, disconnecting peer: {}", peer);
           peer.disconnect(DisconnectMessage.DisconnectReason.BREACH_OF_PROTOCOL);
           return Optional.empty();
         }
@@ -113,7 +116,7 @@ public abstract class AbstractGetHeadersFromPeerTask
       headersList.add(header);
     }
 
-    LOG.debug("Received {} of {} headers requested from peer.", headersList.size(), count);
+    LOG.debug("Received {} of {} headers requested from peer {}", headersList.size(), count, peer);
     return Optional.of(headersList);
   }
 

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/manager/task/GetBlockFromPeerTask.java

@@ -74,13 +74,18 @@ public class GetBlockFromPeerTask extends AbstractPeerTask<Block> {
         .whenComplete(
             (r, t) -> {
               if (t != null) {
-                LOG.info(
-                    "Failed to download block {} from peer {}.",
+                LOG.debug(
+                    "Failed to download block {} from peer {} with message '{}' and cause '{}'",
                     blockIdentifier,
-                    assignedPeer.map(EthPeer::toString).orElse("<any>"));
+                    assignedPeer.map(EthPeer::toString).orElse("<any>"),
+                    t.getMessage(),
+                    t.getCause());
                 result.completeExceptionally(t);
               } else if (r.getResult().isEmpty()) {
-                LOG.info("Failed to download block {} from peer {}.", blockIdentifier, r.getPeer());
+                LOG.debug(
+                    "Failed to download block {} from peer {} with empty result.",
+                    blockIdentifier,
+                    r.getPeer());
                 result.completeExceptionally(new IncompleteResultsException());
               } else {
                 LOG.debug(
@@ -111,6 +116,7 @@ public class GetBlockFromPeerTask extends AbstractPeerTask<Block> {
   private CompletableFuture<PeerTaskResult<List<Block>>> completeBlock(
       final PeerTaskResult<List<BlockHeader>> headerResult) {
     if (headerResult.getResult().isEmpty()) {
+      LOG.debug("header result is empty.");
       return CompletableFuture.failedFuture(new IncompleteResultsException());
     }
 

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/manager/task/GetBodiesFromPeerTask.java

@@ -106,9 +106,11 @@ public class GetBodiesFromPeerTask extends AbstractPeerRequestTask<List<Block>>
     final List<BlockBody> bodies = bodiesMessage.bodies(protocolSchedule);
     if (bodies.size() == 0) {
       // Message contains no data - nothing to do
+      LOG.debug("Message contains no data. Peer: {}", peer);
       return Optional.empty();
     } else if (bodies.size() > headers.size()) {
       // Message doesn't match our request - nothing to do
+      LOG.debug("Message doesn't match our request. Peer: {}", peer);
       return Optional.empty();
     }
 
@@ -117,6 +119,7 @@ public class GetBodiesFromPeerTask extends AbstractPeerRequestTask<List<Block>>
       final List<BlockHeader> headers = bodyToHeaders.get(new BodyIdentifier(body));
       if (headers == null) {
         // This message contains unrelated bodies - exit
+        LOG.debug("This message contains unrelated bodies. Peer: {}", peer);
         return Optional.empty();
       }
       headers.forEach(h -> blocks.add(new Block(h, body)));