Fix for Load job failed JSON exception

src/Storages/MergeTree/checkDataPart.cpp

@@ -102,10 +102,13 @@ bool isRetryableException(std::exception_ptr exception_ptr)
     {
         return true;
     }
-
-    /// In fact, there can be other similar situations.
-    /// But it is OK, because there is a safety guard against deleting too many parts.
-    return false;
+    catch (...)
+    {
+        /// In fact, there can be other similar situations.
+        /// But it is OK, because there is a safety guard against deleting too many parts.
+        return false;
+    }
+    UNREACHABLE();
 }
 
 

tests/integration/test_restart_server/test.py

@@ -34,3 +34,23 @@ def test_flushes_async_insert_queue():
     )
     node.restart_clickhouse()
     assert node.query("SELECT * FROM flush_test") == "world\t23456\n"
+
+
+def test_serialization_json_broken(start_cluster):
+    node.query("DROP TABLE IF EXISTS test")
+
+    node.query(
+        "CREATE TABLE test( a int, b  Map(String, String)) Engine = MergeTree() order by a"
+    )
+    node.query("INSERT INTO test SELECT number, map('aaa', 'bbb') from numbers(10)")
+
+    metadata_path = node.query(
+        "SELECT arrayJoin(data_paths) FROM system.tables WHERE table='test'"
+    ).split("\n")
+
+    node.exec_in_container(
+        ["bash", "-c", f"echo '' > {metadata_path[0]}all_1_1_0/serialization.json"]
+    )
+    node.restart_clickhouse()
+
+    node.query("SELECT 1")