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The following commit(s) were added to refs/heads/master by this push:
     new 17dda6176f8 [FLINK-38903] Update flink-shaded to 21.0
17dda6176f8 is described below

commit 17dda6176f87bcc410b16b0cc51e86b6a64b3e8f
Author: Mate Czagany <[email protected]>
AuthorDate: Thu Jan 22 00:56:36 2026 +0100

    [FLINK-38903] Update flink-shaded to 21.0
---
 .../generated/security_configuration.html          |  2 +-
 .../shortcodes/generated/security_ssl_section.html |  2 +-
 .../flink/configuration/SecurityOptions.java       |  2 +-
 .../src/test/resources/rest_api_v1.snapshot        | 90 ++++++++++++++++------
 .../org/apache/flink/runtime/net/SSLUtils.java     | 16 ++++
 .../network/netty/NettyConnectionManagerTest.java  | 22 +++++-
 .../planner/plan/nodes/exec/ExecNodeBase.java      |  2 +-
 pom.xml                                            | 14 ++--
 8 files changed, 114 insertions(+), 36 deletions(-)

diff --git a/docs/layouts/shortcodes/generated/security_configuration.html 
b/docs/layouts/shortcodes/generated/security_configuration.html
index ff19479042e..85109758ab9 100644
--- a/docs/layouts/shortcodes/generated/security_configuration.html
+++ b/docs/layouts/shortcodes/generated/security_configuration.html
@@ -244,7 +244,7 @@
         </tr>
         <tr>
             <td><h5>security.ssl.verify-hostname</h5></td>
-            <td style="word-wrap: break-word;">true</td>
+            <td style="word-wrap: break-word;">false</td>
             <td>Boolean</td>
             <td>Flag to enable peer’s hostname verification during ssl 
handshake.</td>
         </tr>
diff --git a/docs/layouts/shortcodes/generated/security_ssl_section.html 
b/docs/layouts/shortcodes/generated/security_ssl_section.html
index ad5c72b3cf2..8a4f869e308 100644
--- a/docs/layouts/shortcodes/generated/security_ssl_section.html
+++ b/docs/layouts/shortcodes/generated/security_ssl_section.html
@@ -136,7 +136,7 @@
         </tr>
         <tr>
             <td><h5>security.ssl.verify-hostname</h5></td>
-            <td style="word-wrap: break-word;">true</td>
+            <td style="word-wrap: break-word;">false</td>
             <td>Boolean</td>
             <td>Flag to enable peer’s hostname verification during ssl 
handshake.</td>
         </tr>
diff --git 
a/flink-core/src/main/java/org/apache/flink/configuration/SecurityOptions.java 
b/flink-core/src/main/java/org/apache/flink/configuration/SecurityOptions.java
index 24ecf2f6eaf..d4ff4431335 100644
--- 
a/flink-core/src/main/java/org/apache/flink/configuration/SecurityOptions.java
+++ 
b/flink-core/src/main/java/org/apache/flink/configuration/SecurityOptions.java
@@ -519,7 +519,7 @@ public class SecurityOptions {
     public static final ConfigOption<Boolean> SSL_VERIFY_HOSTNAME =
             key("security.ssl.verify-hostname")
                     .booleanType()
-                    .defaultValue(true)
+                    .defaultValue(false)
                     .withDescription(
                             "Flag to enable peer’s hostname verification 
during ssl handshake.");
 
diff --git a/flink-runtime-web/src/test/resources/rest_api_v1.snapshot 
b/flink-runtime-web/src/test/resources/rest_api_v1.snapshot
index d9ec78270e2..b8d8f19359e 100644
--- a/flink-runtime-web/src/test/resources/rest_api_v1.snapshot
+++ b/flink-runtime-web/src/test/resources/rest_api_v1.snapshot
@@ -1552,7 +1552,7 @@
           "properties" : {
             "checkpointed_size" : {
               "type" : "object",
-              "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto",
+              "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto",
               "properties" : {
                 "min" : {
                   "type" : "integer"
@@ -1582,23 +1582,23 @@
             },
             "state_size" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             },
             "end_to_end_duration" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             },
             "alignment_buffered" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             },
             "processed_data" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             },
             "persisted_data" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             }
           }
         },
@@ -2155,7 +2155,7 @@
           "properties" : {
             "checkpointed_size" : {
               "type" : "object",
-              "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto",
+              "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto",
               "properties" : {
                 "min" : {
                   "type" : "integer"
@@ -2185,11 +2185,11 @@
             },
             "state_size" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             },
             "end_to_end_duration" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             },
             "checkpoint_duration" : {
               "type" : "object",
@@ -2197,11 +2197,11 @@
               "properties" : {
                 "sync" : {
                   "type" : "object",
-                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
                 },
                 "async" : {
                   "type" : "object",
-                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
                 }
               }
             },
@@ -2211,25 +2211,25 @@
               "properties" : {
                 "buffered" : {
                   "type" : "object",
-                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
                 },
                 "processed" : {
                   "type" : "object",
-                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
                 },
                 "persisted" : {
                   "type" : "object",
-                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
                 },
                 "duration" : {
                   "type" : "object",
-                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+                  "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
                 }
               }
             },
             "start_delay" : {
               "type" : "object",
-              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util.stats:StatsSummaryDto"
+              "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:util:stats:StatsSummaryDto"
             }
           }
         },
@@ -2820,7 +2820,30 @@
     },
     "response" : {
       "type" : "object",
-      "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobResourceRequirementsBody"
+      "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobResourceRequirementsBody",
+      "properties" : {
+        "jobVertexResourceRequirements" : {
+          "type" : "object",
+          "additionalProperties" : {
+            "type" : "object",
+            "id" : 
"urn:jsonschema:org:apache:flink:runtime:jobgraph:JobVertexResourceRequirements",
+            "properties" : {
+              "parallelism" : {
+                "type" : "object",
+                "id" : 
"urn:jsonschema:org:apache:flink:runtime:jobgraph:JobVertexResourceRequirements:Parallelism",
+                "properties" : {
+                  "lowerBound" : {
+                    "type" : "integer"
+                  },
+                  "upperBound" : {
+                    "type" : "integer"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
     }
   }, {
     "url" : "/jobs/:jobid/resource-requirements",
@@ -2837,7 +2860,30 @@
     },
     "request" : {
       "type" : "object",
-      "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobResourceRequirementsBody"
+      "id" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobResourceRequirementsBody",
+      "properties" : {
+        "jobVertexResourceRequirements" : {
+          "type" : "object",
+          "additionalProperties" : {
+            "type" : "object",
+            "id" : 
"urn:jsonschema:org:apache:flink:runtime:jobgraph:JobVertexResourceRequirements",
+            "properties" : {
+              "parallelism" : {
+                "type" : "object",
+                "id" : 
"urn:jsonschema:org:apache:flink:runtime:jobgraph:JobVertexResourceRequirements:Parallelism",
+                "properties" : {
+                  "lowerBound" : {
+                    "type" : "integer"
+                  },
+                  "upperBound" : {
+                    "type" : "integer"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
     },
     "response" : {
       "type" : "object",
@@ -4441,12 +4487,12 @@
               "jobId" : {
                 "type" : "any"
               },
-              "assignedTasks" : {
-                "type" : "integer"
-              },
               "resource" : {
                 "type" : "object",
                 "$ref" : 
"urn:jsonschema:org:apache:flink:runtime:rest:messages:ResourceProfileInfo"
+              },
+              "assignedTasks" : {
+                "type" : "integer"
               }
             }
           }
@@ -4634,4 +4680,4 @@
       }
     }
   } ]
-}
+}
\ No newline at end of file
diff --git 
a/flink-runtime/src/main/java/org/apache/flink/runtime/net/SSLUtils.java 
b/flink-runtime/src/main/java/org/apache/flink/runtime/net/SSLUtils.java
index 0660873b1cb..898511b9556 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/net/SSLUtils.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/net/SSLUtils.java
@@ -367,6 +367,8 @@ public class SSLUtils {
             sslContextBuilder = SslContextBuilder.forServer(kmf);
         }
 
+        setHostnameVerification(sslContextBuilder, config, clientMode);
+
         Optional<TrustManagerFactory> tmf = getTrustManagerFactory(config, 
true);
         tmf.map(sslContextBuilder::trustManager);
 
@@ -433,6 +435,8 @@ public class SSLUtils {
             sslContextBuilder = SslContextBuilder.forServer(kmf);
         }
 
+        setHostnameVerification(sslContextBuilder, config, clientMode);
+
         if (clientMode || clientAuth != ClientAuth.NONE) {
             Optional<TrustManagerFactory> tmf = getTrustManagerFactory(config, 
false);
             tmf.map(
@@ -453,6 +457,18 @@ public class SSLUtils {
     //  Utilities
     // ------------------------------------------------------------------------
 
+    /**
+     * Set hostname verification. By default, Netty will enable hostname 
verification since 4.2.x
+     * for client-mode connections.
+     */
+    private static void setHostnameVerification(
+            SslContextBuilder sslContextBuilder, Configuration config, boolean 
clientMode) {
+        if (clientMode) {
+            sslContextBuilder.endpointIdentificationAlgorithm(
+                    config.get(SecurityOptions.SSL_VERIFY_HOSTNAME) ? "HTTPS" 
: null);
+        }
+    }
+
     private static String getAndCheckOption(
             Configuration config,
             ConfigOption<String> primaryOption,
diff --git 
a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyConnectionManagerTest.java
 
b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyConnectionManagerTest.java
index 27566b2e3ba..9fcb4c0abd8 100644
--- 
a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyConnectionManagerTest.java
+++ 
b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyConnectionManagerTest.java
@@ -36,6 +36,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 /** Simple netty connection manager test. */
 class NettyConnectionManagerTest {
 
+    private static final String EVENT_EXECUTOR_GROUP_FIELD_CHILDREN = 
"children";
+
     /**
      * Tests that the number of arenas and number of threads of the client and 
server are set to the
      * same number, that is the number of configured task slots.
@@ -68,7 +70,7 @@ class NettyConnectionManagerTest {
             Bootstrap boostrap = connectionManager.getClient().getBootstrap();
             EventLoopGroup group = boostrap.config().group();
 
-            Field f = 
group.getClass().getSuperclass().getSuperclass().getDeclaredField("children");
+            Field f = getInheritedField(group.getClass());
             f.setAccessible(true);
             Object[] eventExecutors = (Object[]) f.get(group);
 
@@ -80,7 +82,7 @@ class NettyConnectionManagerTest {
             ServerBootstrap bootstrap = 
connectionManager.getServer().getBootstrap();
             EventLoopGroup group = bootstrap.config().group();
 
-            Field f = 
group.getClass().getSuperclass().getSuperclass().getDeclaredField("children");
+            Field f = getInheritedField(group.getClass());
             f.setAccessible(true);
             Object[] eventExecutors = (Object[]) f.get(group);
 
@@ -92,7 +94,7 @@ class NettyConnectionManagerTest {
             ServerBootstrap bootstrap = 
connectionManager.getServer().getBootstrap();
             EventLoopGroup group = bootstrap.childGroup();
 
-            Field f = 
group.getClass().getSuperclass().getSuperclass().getDeclaredField("children");
+            Field f = getInheritedField(group.getClass());
             f.setAccessible(true);
             Object[] eventExecutors = (Object[]) f.get(group);
 
@@ -104,4 +106,18 @@ class NettyConnectionManagerTest {
         return new NettyConnectionManager(
                 new ResultPartitionManager(), new TaskEventDispatcher(), 
config, true);
     }
+
+    private static Field getInheritedField(Class<?> clazz) {
+        while (clazz != null) {
+            try {
+                Field field = 
clazz.getDeclaredField(EVENT_EXECUTOR_GROUP_FIELD_CHILDREN);
+                field.setAccessible(true);
+                return field;
+            } catch (NoSuchFieldException e) {
+                clazz = clazz.getSuperclass();
+            }
+        }
+        throw new IllegalArgumentException(
+                "Field " + EVENT_EXECUTOR_GROUP_FIELD_CHILDREN + " not found 
in hierarchy");
+    }
 }
diff --git 
a/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/ExecNodeBase.java
 
b/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/ExecNodeBase.java
index 92d9f8fbd95..26a56ad1968 100644
--- 
a/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/ExecNodeBase.java
+++ 
b/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/ExecNodeBase.java
@@ -92,7 +92,7 @@ public abstract class ExecNodeBase<T> implements ExecNode<T> {
      * Retrieves the default context from the {@link ExecNodeMetadata} 
annotation to be serialized
      * into the JSON plan.
      */
-    @JsonProperty(value = FIELD_NAME_TYPE, access = 
JsonProperty.Access.READ_ONLY, index = 1)
+    @JsonProperty(value = FIELD_NAME_TYPE, index = 1)
     protected final ExecNodeContext getContextFromAnnotation() {
         return isCompiled ? context : 
ExecNodeContext.newContext(this.getClass()).withId(getId());
     }
diff --git a/pom.xml b/pom.xml
index a3d9c467dd1..91bacb64b79 100644
--- a/pom.xml
+++ b/pom.xml
@@ -127,9 +127,9 @@ under the License.
                <flink.forkCountUnitTest>4</flink.forkCountUnitTest>
                <flink.reuseForks>true</flink.reuseForks>
                <flink.surefire.baseArgLine>-XX:+UseG1GC -Xms256m 
-XX:+IgnoreUnrecognizedVMOptions 
${surefire.module.config}</flink.surefire.baseArgLine>
-               <flink.shaded.version>20.0</flink.shaded.version>
-               
<flink.shaded.jackson.version>2.18.2</flink.shaded.jackson.version>
-               
<flink.shaded.jsonpath.version>2.9.0</flink.shaded.jsonpath.version>
+               <flink.shaded.version>21.0</flink.shaded.version>
+               
<flink.shaded.jackson.version>2.20.1</flink.shaded.jackson.version>
+               
<flink.shaded.jsonpath.version>2.10.0</flink.shaded.jsonpath.version>
                <flink.markBundledAsOptional>true</flink.markBundledAsOptional>
                <source.java.version>11</source.java.version>
                <target.java.version>17</target.java.version>
@@ -355,13 +355,13 @@ under the License.
                        <dependency>
                                <groupId>org.apache.flink</groupId>
                                <artifactId>flink-shaded-asm-9</artifactId>
-                               <version>9.6-${flink.shaded.version}</version>
+                               <version>9.9.1-${flink.shaded.version}</version>
                        </dependency>
 
                        <dependency>
                                <groupId>org.apache.flink</groupId>
                                <artifactId>flink-shaded-guava</artifactId>
-                               
<version>33.4.0-jre-${flink.shaded.version}</version>
+                               
<version>33.5.0-jre-${flink.shaded.version}</version>
                        </dependency>
 
                        <dependency>
@@ -379,13 +379,13 @@ under the License.
                        <dependency>
                                <groupId>org.apache.flink</groupId>
                                <artifactId>flink-shaded-netty</artifactId>
-                               
<version>4.1.100.Final-${flink.shaded.version}</version>
+                               
<version>4.2.6.Final-${flink.shaded.version}</version>
                        </dependency>
 
                        <dependency>
                                <groupId>org.apache.flink</groupId>
                                
<artifactId>flink-shaded-netty-tcnative-dynamic</artifactId>
-                               
<version>2.0.62.Final-${flink.shaded.version}</version>
+                               
<version>2.0.74.Final-${flink.shaded.version}</version>
                                <scope>test</scope>
                        </dependency>
 

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