Enable Eth/65 by Default (#1420)

Enable eth65 by default for the RC period. This commit should be 
reverted if issues are found before the release date.

Signed-off-by: Ratan Rai Sur <ratan.r.sur@gmail.com>

CHANGELOG.md

@@ -12,6 +12,7 @@ Hyperledger Besu is moving its versioning scheme to [CalVer](https://calver.org/
 * Added `debug_standardTraceBadBlockToFile` JSON-RPC API. This API is similar to `debug_standardTraceBlockToFile`, but can be used to obtain info about a block which has been rejected as invalid. [\#1403](https://github.com/hyperledger/besu/pull/1403)
 * Added support for EIP-2929 to YOLOv2. [#1387](https://github.com/hyperledger/besu/pull/1387)     
 * Added `--start-block` and `--end-block` to the `blocks import` subcommand [\#1399](https://github.com/hyperledger/besu/pull/1399)
+* Fixed memory leak in eth/65 subprotocol behavior. It is now enabled by default. [\#1420](https://github.com/hyperledger/besu/pull/1420), [#1348](https://github.com/hyperledger/besu/pull/1348), [#1321](https://github.com/hyperledger/besu/pull/1321)
 
 ### Bug Fixes
 
@@ -19,7 +20,6 @@ Hyperledger Besu is moving its versioning scheme to [CalVer](https://calver.org/
 
 #### Previously identified known issues
 
-- [Eth/65 loses peers](KNOWN_ISSUES.md#eth65-loses-peers)
 - [Fast sync when running Besu on cloud providers](KNOWN_ISSUES.md#fast-sync-when-running-besu-on-cloud-providers)
 - [Privacy users with private transactions created using v1.3.4 or earlier](KNOWN_ISSUES.md#privacy-users-with-private-transactions-created-using-v134-or-earlier)
 - [Changes not saved to database correctly causing inconsistent private states](KNOWN_ISSUES.md#Changes-not-saved-to-database-correctly-causing-inconsistent-private-states)

KNOWN_ISSUES.md

@@ -5,14 +5,6 @@ in the current release are provided in the [Changelog](CHANGELOG.md).
 
 Known issues are open issues categorized as [Very High or High impact](https://wiki.hyperledger.org/display/BESU/Defect+Prioritisation+Policy). 
 
-## Eth/65 loses peers 
-
-From v1.4.4, `eth/65` is [disabled by default](https://github.com/hyperledger/besu/pull/741). 
-
-If enabled, peers will slowly drop off and eventually Besu will fall out of sync or stop syncing.
-
-A fix for this issue is being actively worked on. 
-
 ## Fast sync when running Besu on cloud providers  
 
 A known [RocksDB issue](https://github.com/facebook/rocksdb/issues/6435) causes fast sync to fail 

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/EthProtocolConfiguration.java

@@ -27,7 +27,7 @@ public class EthProtocolConfiguration {
   public static final int DEFAULT_MAX_GET_RECEIPTS = 256;
   public static final int DEFAULT_MAX_GET_NODE_DATA = 384;
   public static final int DEFAULT_MAX_GET_POOLED_TRANSACTIONS = 256;
-  public static final boolean DEFAULT_ETH_65_ENABLED = false;
+  public static final boolean DEFAULT_ETH_65_ENABLED = true;
 
   private final int maxGetBlockHeaders;
   private final int maxGetBlockBodies;