Fixed more issues that could cause transactions to be held open.

src/main/java/org/qortal/controller/repository/AtStatesPruner.java

@@ -94,6 +94,7 @@ public class AtStatesPruner implements Runnable {
 					else {
 						// We've pruned up to the upper prunable height
 						// Back off for a while to save CPU for syncing
+						repository.discardChanges();
 						Thread.sleep(5*60*1000L);
 					}
 				}

src/main/java/org/qortal/controller/repository/BlockArchiver.java

@@ -25,18 +25,19 @@ public class BlockArchiver implements Runnable {
 		}
 
 		try (final Repository repository = RepositoryManager.getRepository()) {
+			// Don't even start building until initial rush has ended
+			Thread.sleep(INITIAL_SLEEP_PERIOD);
+
 			int startHeight = repository.getBlockArchiveRepository().getBlockArchiveHeight();
 
 			// Don't attempt to archive if we have no ATStatesHeightIndex, as it will be too slow
 			boolean hasAtStatesHeightIndex = repository.getATRepository().hasAtStatesHeightIndex();
 			if (!hasAtStatesHeightIndex) {
 				LOGGER.info("Unable to start block archiver due to missing ATStatesHeightIndex. Bootstrapping is recommended.");
+				repository.discardChanges();
 				return;
 			}
 
-			// Don't even start building until initial rush has ended
-			Thread.sleep(INITIAL_SLEEP_PERIOD);
-
 			LOGGER.info("Starting block archiver...");
 
 			while (!Controller.isStopping()) {
@@ -91,6 +92,7 @@ public class BlockArchiver implements Runnable {
 							// that a bootstrap or re-sync is needed. Try again every minute until then.
 							LOGGER.info("Error: block not found when building archive. If this error persists, " +
 									"a bootstrap or re-sync may be needed.");
+							repository.discardChanges();
 							Thread.sleep( 60 * 1000L); // 1 minute
 							break;
 					}

src/main/java/org/qortal/controller/repository/BlockPruner.java

@@ -99,6 +99,7 @@ public class BlockPruner implements Runnable {
 					else {
 						// We've pruned up to the upper prunable height
 						// Back off for a while to save CPU for syncing
+						repository.discardChanges();
 						Thread.sleep(10*60*1000L);
 					}
 				}

src/main/java/org/qortal/repository/Bootstrap.java

@@ -317,6 +317,7 @@ public class Bootstrap {
                 LOGGER.info("Retrying in 5 minutes");
 
                 try {
+                    repository.discardChanges();
                     Thread.sleep(5 * 60 * 1000L);
                 } catch (InterruptedException e2) {
                     break;