Merge branch 'cassandra-3.11' into trunk

CHANGES.txt

@@ -49,6 +49,7 @@
 Merged from 3.11:
  * Allow sstableloader to use SSL on the native port (CASSANDRA-14904)
 Merged from 3.0:
+ * cqlsh return non-zero status when STDIN CQL fails (CASSANDRA-15623)
  * Don't skip sstables in slice queries based only on local min/max/deletion timestamp (CASSANDRA-15690)
  * Memtable memory allocations may deadlock (CASSANDRA-15367)
  * Run evictFromMembership in GossipStage (CASSANDRA-15592)

bin/cqlsh.py

@@ -539,6 +539,10 @@ class Shell(cmd.Cmd):
         self.single_statement = single_statement
         self.is_subshell = is_subshell
 
+    @property
+    def batch_mode(self):
+        return not self.tty
+
     @property
     def is_using_utf8(self):
         # utf8 encodings from https://docs.python.org/{2,3}/library/codecs.html
@@ -2467,8 +2471,7 @@ def main(options, hostname, port):
     shell.cmdloop()
     save_history()
 
-    batch_mode = options.file or options.execute
-    if batch_mode and shell.statement_error:
+    if shell.batch_mode and shell.statement_error:
         sys.exit(2)