# Duplicated Account. Please use updateKeyring() instead \<\< 오류가 발생합니다

**URL:** <https://devforum.kaia.io/t/duplicated-account-please-use-updatekeyring-instead/1277>\
**Category:** Caver\
**Created:** [6월 11, 2021, 1:24오전 UTC](https://devforum.kaia.io/t/duplicated-account-please-use-updatekeyring-instead/1277 "2021-06-11T01:24:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hlib](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/hlib/32/687_2.png) [@hlib](https://devforum.kaia.io/u/hlib)\
**Post date:** [6월 11, 2021, 1:24오전 UTC](https://devforum.kaia.io/t/duplicated-account-please-use-updatekeyring-instead/1277/1 "2021-06-11T01:24:41Z")

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안녕하세요? caver-java로 여러개의 transaction을 동시에 발생시켜 보는 시험을 진행하는 중에 위와 같은 에러가 발생해서 문의 드립니다.

for(Integer i = 0; i \< 1000; i++) {  
Optional txHash = myErc20Service.transfer(  
caverj.getCaver(),  
keyring,  
nonce,  
ca,  
to,  
amount);  
nonce = nonce.add(BigInteger.ONE);  
nonceManager.setNonce(keyring.getAddress(), nonce);  
}

ERC20 토큰 컨트랙트 하나 생성해서 특정 계정으로 소량의 토큰을 1000번 전송시키는 코드입니다.  
transaction 마다 keyring의 nonce값을 1씩 증가시켜 대입하였습니다.

loop 코드를 제거하고 단일 트랜젝션을 전송하면 정상적으로 처리가 됩니다. 루핑을 시켜 트랜젝션을 2회 이상 발생시키면 제목과 같은 에러가 발생합니다.

아래는 에러 원문입니다.  
Duplicated Account. Please use updateKeyring() instead  
java.lang.IllegalArgumentException: Duplicated Account. Please use updateKeyring() instead  
at com.klaytn.caver.wallet.KeyringContainer.add(KeyringContainer.java:180)  
at com.hlib.excaverjava.myerc20.service.MyERC20Service.transfer(MyERC20Service.java:120)  
at com.hlib.excaverjava.myerc20.service.MyERC20ServiceTest.transferBulk(MyERC20ServiceTest.java:126)  
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)  
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  
at java.base/java.lang.reflect.Method.invoke(Method.java:566)  
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688)  
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)  
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)  
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)  
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)  
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)  
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)  
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)  
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)  
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)  
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)  
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)  
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)  
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)  
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206)  
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131)  
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)  
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)  
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)  
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)  
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)  
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)  
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)  
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)  
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)  
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)  
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)  
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)  
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)  
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)  
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)  
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)  
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)  
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)  
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)  
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)  
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99)  
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79)  
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75)  
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61)  
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)  
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  
at java.base/java.lang.reflect.Method.invoke(Method.java:566)  
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)  
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)  
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)  
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)  
at com.sun.proxy.$Proxy2.stop(Unknown Source)  
at org.gradle.api.internal.tasks.testing.worker.TestWorker.stop(TestWorker.java:135)  
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)  
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  
at java.base/java.lang.reflect.Method.invoke(Method.java:566)  
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)  
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)  
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)  
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)  
at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)  
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)  
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)  
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)  
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)  
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)  
at java.base/java.lang.Thread.run(Thread.java:834)

감사드립니다.

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<div class="post-metadata">

**Author:** ![hlib](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/hlib/32/687_2.png) [@hlib](https://devforum.kaia.io/u/hlib)\
**Post date:** [6월 11, 2021, 2:29오전 UTC](https://devforum.kaia.io/t/duplicated-account-please-use-updatekeyring-instead/1277/2 "2021-06-11T02:29:02Z")

</div>

죄송합니다.  
myERC20Service.transfer() 안에서  
caverj.getCaver().wallet.add(keyring); 가 호출되었던게 문제였습니다.

sign시 wallet을 사용하지 않도록 수정한 결과 정상동작 함을 확인하였습니다.