--- a/src/goodjava/lucene/logging/LoggingIndexWriter.java	Sat May 16 12:33:41 2020 +0300
+++ b/src/goodjava/lucene/logging/LoggingIndexWriter.java	Sat May 16 17:56:02 2020 -0600
@@ -230,13 +230,21 @@
 	public void check(SortField sortField) throws IOException {
 		if( isChecking )
 			throw new RuntimeException("another check is running");
+		isChecking = true;
+		try {
+			doCheck(sortField);
+		} finally {
+			isChecking = false;
+		}
+	}
+
+	protected void doCheck(SortField sortField) throws IOException {
 		IndexReader indexReader;
 		List<LogInputStream> logReaders;
 		synchronized(this) {
 			indexReader = indexWriter.openReader();
 			logReaders = logReaders(logs);
 		}
-		isChecking = true;
 		try {
 			logger.info("check start");
 			indexWriter.check();
@@ -302,7 +310,6 @@
 			IoUtils.deleteRecursively(dirFile);
 			logger.info("check done");
 		} finally {
-			isChecking = false;
 			indexReader.close();
 		}
 	}