diff -r f8eba0442956 -r 1578324d2aac src/goodjava/lucene/backup/BackupIndexWriter.java
--- a/src/goodjava/lucene/backup/BackupIndexWriter.java	Thu Feb 22 08:08:07 2024 -0700
+++ b/src/goodjava/lucene/backup/BackupIndexWriter.java	Thu Feb 22 08:34:55 2024 -0700
@@ -22,6 +22,7 @@
 import goodjava.rpc.RpcCall;
 import goodjava.rpc.RpcResult;
 import goodjava.rpc.RpcException;
+import goodjava.rpc.RpcError;
 import goodjava.lucene.api.LuceneIndexWriter;
 import goodjava.lucene.logging.LoggingIndexWriter;
 import goodjava.lucene.logging.LogFile;
@@ -60,7 +61,7 @@
 		super.commit();
 		//sync();
 		if( !isSyncPending ) {
-			exec.execute(sync);
+			exec.execute(syncR);
 			isSyncPending = true;
 		}
 	}
@@ -73,14 +74,14 @@
 	}
 
 	public void runSync() {
-		exec(sync);
+		execR(syncR);
 	}
 
 	public void runSyncWithChecksum() {
-		exec(syncWithChecksum);
+		execR(syncWithChecksum);
 	}
 
-	private void exec(Runnable r) {
+	private void execR(Runnable r) {
 		try {
 			exec.submit(r).get();
 		} catch(InterruptedException e) {
@@ -93,7 +94,7 @@
 		}
 	}
 
-	private final Runnable sync = new Runnable() {
+	private final Runnable syncR = new Runnable() {
 		public void run() {
 			try {
 				sync(false);
@@ -101,6 +102,9 @@
 				logger.error("sync failed: "+e.getMessage());
 			} catch(IOException e) {
 				throw new RuntimeException(e);
+			} catch(RpcError e) {
+				logger.error("",e);
+				throw e;
 			}
 		}
 	};