lovepoem commented on issue #280: dubbo 序列化问题.有谁遇到过吗 URL: https://github.com/apache/incubator-dubbo/issues/280#issuecomment-405533132 The native Map from jdk is ok But com.google.common.collect.SingletonImmutableMap is from guava， the map initialize method is different。 So occurs bug ```java @Test public void testImmutableBiMapSerializer() throws Exception { Map<Integer, String> map = new ImmutableMap.Builder<Integer, String>() .put(30, "30") .put(43, "30").build(); Map<Integer, String> deserialize = baseHessianSerialize(map); Assert.assertTrue(deserialize.equals(map)); } ``` ```log com.alibaba.com.caucho.hessian.io.HessianProtocolException: 'com.google.common.collect.ImmutableMap$SerializedForm' could not be instantiated at com.alibaba.com.caucho.hessian.io.JavaDeserializer.instantiate(JavaDeserializer.java:316) at com.alibaba.com.caucho.hessian.io.JavaDeserializer.readMap(JavaDeserializer.java:185) at com.alibaba.com.caucho.hessian.io.SerializerFactory.readMap(SerializerFactory.java:506) at com.alibaba.com.caucho.hessian.io.HessianInput.readObject(HessianInput.java:1188) at com.alibaba.com.caucho.hessian.io.HessianInput.readObject(HessianInput.java:1095) at com.alibaba.com.caucho.hessian.io.base.SerializeTestBase.baseHessianSerialize(SerializeTestBase.java:50) at com.alibaba.com.caucho.hessian.io.MapSerializerTest.testImmutableBiMapSerializer(MapSerializerTest.java:47) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.alibaba.com.caucho.hessian.io.JavaDeserializer.instantiate(JavaDeserializer.java:312) ... 28 more Caused by: java.lang.NullPointerException at com.google.common.collect.ImmutableMap$SerializedForm.<init>(ImmutableMap.java:531) ... 33 more ```
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