Disable archiving and pruning if the AtStatesHeightIndex is missing, and log it so that the user knows they should bootstrap or resync.

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

@@ -27,6 +27,13 @@ public class BlockArchiver implements Runnable {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			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.");
+				return;
+			}
+
 			// Don't even start building until initial rush has ended
 			Thread.sleep(INITIAL_SLEEP_PERIOD);
 

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

@@ -34,6 +34,13 @@ public class BlockPruner implements Runnable {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			int pruneStartHeight = repository.getBlockRepository().getBlockPruneHeight();
 
+			// Don't attempt to prune if we have no ATStatesHeightIndex, as it will be too slow
+			boolean hasAtStatesHeightIndex = repository.getATRepository().hasAtStatesHeightIndex();
+			if (!hasAtStatesHeightIndex) {
+				LOGGER.info("Unable to start block pruner due to missing ATStatesHeightIndex. Bootstrapping is recommended.");
+				return;
+			}
+
 			while (!Controller.isStopping()) {
 				repository.discardChanges();
 

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

@@ -1,5 +1,7 @@
 package org.qortal.repository;
 
+import java.sql.ResultSet;
+import java.sql.SQLException;
 import java.util.List;
 import java.util.Set;
 
@@ -146,6 +148,10 @@ public interface ATRepository {
 	public int pruneAtStates(int minHeight, int maxHeight) throws DataException;
 
 
+	/** Checks for the presence of the ATStatesHeightIndex in repository */
+	public boolean hasAtStatesHeightIndex() throws DataException;
+
+
 	/**
 	 * Save ATStateData into repository.
 	 * <p>

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

@@ -61,11 +61,16 @@ public abstract class RepositoryManager {
 	public static boolean archive() {
 		// Bulk archive the database the first time we use archive mode
 		if (Settings.getInstance().isArchiveEnabled()) {
-			try {
-				return HSQLDBDatabaseArchiving.buildBlockArchive();
+			if (RepositoryManager.canArchiveOrPrune()) {
+				try {
+					return HSQLDBDatabaseArchiving.buildBlockArchive();
 
-			} catch (DataException e) {
-				LOGGER.info("Unable to bulk prune AT states. The database may have been left in an inconsistent state.");
+				} catch (DataException e) {
+					LOGGER.info("Unable to build block archive. The database may have been left in an inconsistent state.");
+				}
+			}
+			else {
+				LOGGER.info("Unable to build block archive due to missing ATStatesHeightIndex. Bootstrapping is recommended.");
 			}
 		}
 		return false;
@@ -75,18 +80,23 @@ public abstract class RepositoryManager {
 		// Bulk prune the database the first time we use pruning mode
 		if (Settings.getInstance().isPruningEnabled() ||
 			Settings.getInstance().isArchiveEnabled()) {
-			try {
-				boolean prunedATStates = HSQLDBDatabasePruning.pruneATStates();
-				boolean prunedBlocks = HSQLDBDatabasePruning.pruneBlocks();
+			if (RepositoryManager.canArchiveOrPrune()) {
+				try {
+					boolean prunedATStates = HSQLDBDatabasePruning.pruneATStates();
+					boolean prunedBlocks = HSQLDBDatabasePruning.pruneBlocks();
 
-				// Perform repository maintenance to shrink the db size down
-				if (prunedATStates && prunedBlocks) {
-					HSQLDBDatabasePruning.performMaintenance();
-					return true;
+					// Perform repository maintenance to shrink the db size down
+					if (prunedATStates && prunedBlocks) {
+						HSQLDBDatabasePruning.performMaintenance();
+						return true;
+					}
+
+				} catch (SQLException | DataException e) {
+					LOGGER.info("Unable to bulk prune AT states. The database may have been left in an inconsistent state.");
 				}
-
-			} catch (SQLException | DataException e) {
-				LOGGER.info("Unable to bulk prune AT states. The database may have been left in an inconsistent state.");
+			}
+			else {
+				LOGGER.info("Unable to prune blocks due to missing ATStatesHeightIndex. Bootstrapping is recommended.");
 			}
 		}
 		return false;
@@ -118,4 +128,12 @@ public abstract class RepositoryManager {
 		return SQLException.class.isInstance(cause) && repositoryFactory.isDeadlockException((SQLException) cause);
 	}
 
+	public static boolean canArchiveOrPrune() {
+		try (final Repository repository = getRepository()) {
+			return repository.getATRepository().hasAtStatesHeightIndex();
+		} catch (DataException e) {
+			return false;
+		}
+	}
+
 }

src/main/java/org/qortal/repository/hsqldb/HSQLDBATRepository.java

@@ -798,6 +798,19 @@ public class HSQLDBATRepository implements ATRepository {
 	}
 
 
+	@Override
+	public boolean hasAtStatesHeightIndex() throws DataException {
+		String sql = "SELECT INDEX_NAME FROM INFORMATION_SCHEMA.SYSTEM_INDEXINFO where INDEX_NAME='ATSTATESHEIGHTINDEX'";
+
+		try (ResultSet resultSet = this.repository.checkedExecute(sql)) {
+			return resultSet != null;
+
+		} catch (SQLException e) {
+			throw new DataException("Unable to check for ATStatesHeightIndex in repository", e);
+		}
+	}
+
+
 	@Override
 	public void save(ATStateData atStateData) throws DataException {
 		// We shouldn't ever save partial ATStateData