fix: set default 0 when get method timeout config

core/api/src/main/java/com/alipay/sofa/rpc/config/MethodConfig.java

@@ -137,7 +137,7 @@ public MethodConfig setParameters(Map<String, String> parameters) {
      * @return the timeout
      */
     public Integer getTimeout() {
-        return timeout;
+        return timeout == null ? 0 : timeout;
     }
 
     /**

core/api/src/test/java/com/alipay/sofa/rpc/std/config/AbstractInterfaceConfigTest.java

@@ -23,6 +23,7 @@
 import com.alipay.sofa.rpc.config.AbstractInterfaceConfig;
 import com.alipay.sofa.rpc.config.ApplicationConfig;
 import com.alipay.sofa.rpc.config.MethodConfig;
+import com.alipay.sofa.rpc.config.ProviderConfig;
 import com.alipay.sofa.rpc.config.RegistryConfig;
 import com.alipay.sofa.rpc.core.exception.SofaRpcRuntimeException;
 import com.alipay.sofa.rpc.listener.ConfigListener;
@@ -50,6 +51,22 @@
  * @version : AbstractInterfaceConfigTest.java, v 0.1 2022年01月25日 4:46 下午 zhaowang
  */
 public class AbstractInterfaceConfigTest {
+    @Test
+    public void testMethodTimeout() {
+        MethodConfig config = new MethodConfig();
+        config.setTimeout(null);
+
+        ProviderConfig p = new ProviderConfig();
+        p.setMethods(new HashMap<>());
+        p.getMethods().put("test", config);
+
+        try {
+            Assert.assertFalse(p.hasTimeout());
+        } catch (Exception e) {
+            Assert.fail("exception should not appears: " + e.getMessage());
+        }
+    }
+
 
     @Test
     public void testDefaultValue() {

registry/registry-sofa/src/test/java/com/alipay/sofa/rpc/registry/sofa/SofaRegistryHelperTest.java

@@ -150,6 +150,17 @@ public void convertProviderToUrls() throws Exception {
         Assert.assertEquals(serverConfig3.getPort(), providerInfo3.getPort());
         Assert.assertEquals(providerConfig.getAppName(), providerInfo3.getAttr(ProviderInfoAttrs.ATTR_APP_NAME));
         Assert.assertEquals(providerConfig.getTimeout(), providerInfo3.getDynamicAttr(ProviderInfoAttrs.ATTR_TIMEOUT));
+
+        ProviderConfig<?> providerConfig2 = new ProviderConfig<>();
+        providerConfig2.setMethods(new HashMap<>());
+        providerConfig2.getMethods().put("test", new MethodConfig().setTimeout(null));
+        Assert.assertNotNull(providerConfig2.getTimeout());
+        String s4 = SofaRegistryHelper.convertProviderToUrls(providerConfig2, serverConfig);
+        Assert.assertNotNull(s3);
+        ProviderInfo providerInfo4 = SofaRegistryHelper.parseProviderInfo(s4);
+        Assert.assertEquals(0, providerInfo4.getDynamicAttr(".test.timeout"));
+        Assert.assertFalse(providerConfig2.hasTimeout());
+
     }
 
     @Test