[AMORO-2638] fix refresh-external-catalogs cannot be completed when…

… exist database listTable fails (#2639)

Co-authored-by: huyuanfeng <huyuanfeng@huya.com>

ams/server/src/main/java/com/netease/arctic/server/table/DefaultTableService.java

@@ -53,6 +53,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -461,10 +462,17 @@ void exploreExternalCatalog() {
                   try {
                     tableIdentifiersFutures.add(
                         CompletableFuture.supplyAsync(
-                            () ->
-                                externalCatalog.listTables(database).stream()
+                            () -> {
+                              try {
+                                return externalCatalog.listTables(database).stream()
                                     .map(TableIdentity::new)
-                                    .collect(Collectors.toSet()),
+                                    .collect(Collectors.toSet());
+                              } catch (Exception e) {
+                                LOG.error(
+                                    "TableExplorer list tables in database {} error", database, e);
+                                return new HashSet<>();
+                              }
+                            },
                             tableExplorerExecutors));
                   } catch (RejectedExecutionException e) {
                     LOG.error(