diff --git a/build.py b/build.py
index d21b02118..fbc6b5c7b 100755
--- a/build.py
+++ b/build.py
@@ -89,10 +89,10 @@ def Exit( self ):
   )$
 """
 
-JDTLS_MILESTONE = '1.36.0'
-JDTLS_BUILD_STAMP = '202405301306'
+JDTLS_MILESTONE = '1.42.0'
+JDTLS_BUILD_STAMP = '202411281516'
 JDTLS_SHA256 = (
-  '028e274d06f4a61cad4ffd56f89ef414a8f65613c6d05d9467651b7fb03dae7b'
+  '75d26dc03f886c089958a668dc8baede1a559a6e83bf12c96070a4ee199dc58e'
 )
 
 DEFAULT_RUST_TOOLCHAIN = 'nightly-2024-12-12'
diff --git a/ycmd/tests/java/server_management_test.py b/ycmd/tests/java/server_management_test.py
index 469f3222f..87700424c 100644
--- a/ycmd/tests/java/server_management_test.py
+++ b/ycmd/tests/java/server_management_test.py
@@ -509,15 +509,19 @@ def test_ServerManagement_ConnectionRaisesWhileShuttingDown( self, app ):
     print( f'pid: { pid }' )
     process = psutil.Process( pid )
 
-    completer = handlers._server_state.GetFiletypeCompleter( [ 'java' ] )
-
     # In this test we mock out the GetResponse method, which is used to send
     # the shutdown request. This means we only send the exit notification. It's
     # possible that the server won't like this, but it seems reasonable for it
     # to actually exit at that point.
-    with patch.object( completer.GetConnection(),
-                       'GetResponse',
-                       side_effect = RuntimeError ):
+    from ycmd.completers.language_server import language_server_completer
+    from ycmd.completers.language_server import language_server_protocol as lsp
+
+    def BrokenShutdown( request_id ):
+      return lsp.BuildRequest( None, 'shutdown', None )
+
+    with patch.object( language_server_completer.lsp,
+                       'Shutdown',
+                       side_effect = BrokenShutdown ):
       app.post_json(
         '/run_completer_command',
         BuildRequest(