Connect to 127.0.0.1:8000 [/127.0.0.1] failed: Connection refused (Connection refused)

まず、記載されている Docker コマンドと SAM コマンドで失敗を再現し、次に src/test/resources/test_environment_linux.json で設定されている DynamoDB エンドポイントを com.amazonaws.dao.OrderDao と com.amazonaws.handler.GetOrdersHandler まで追跡します。Lambda コンテナの接続経路と、実行中のローカルデータベースを比較します。curl http://localhost:3000/orders が connection-refused exception なしで完了すれば完了です。

I tried:
Docker run:

• docker run -p 8000:8000 amazon/dynamodb-local
• docker run -p 8000:8000 amazon/dynamodb-local -jar DynamoDBLocal.jar -sharedDb
• docker run -p 8000:8000 amazon/dynamodb-local -jar DynamoDBLocal.jar -sharedDb -inMemory

and :

• sam local start-api --env-vars src/test/resources/test_environment_linux.json

And in all cases I got this :

• App starts normally :
  2019-07-26 15:52:05 Mounting GetOrderFunction at http://127.0.0.1:3000/orders/{order_id} [GET] 2019-07-26 15:52:05 Mounting DeleteOrderFunction at http://127.0.0.1:3000/orders/{order_id} [DELETE] 2019-07-26 15:52:05 Mounting UpdateOrderFunction at http://127.0.0.1:3000/orders/{order_id} [POST] 2019-07-26 15:52:05 Mounting CreateOrderFunction at http://127.0.0.1:3000/orders [POST] 2019-07-26 15:52:05 Mounting GetOrdersFunction at http://127.0.0.1:3000/orders [GET] 2019-07-26 15:52:05 Mounting CreateOrdersTableFunction at http://127.0.0.1:3000/_create_orders_table [POST] 2019-07-26 15:52:05 You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template 2019-07-26 15:52:05 * Running on http://127.0.0.1:3000/ (Press CTRL+C to quit)

• curl to api:
  curl http://localhost:3000/orders

• throws exception:
  2019-07-26 15:49:04 Invoking com.amazonaws.handler.GetOrdersHandler::handleRequest (java8) 2019-07-26 15:49:05 Decompressing /root/Projects/aws-lambda/aws-sam-java-rest/target/aws-sam-java-rest-1.0.0.jar Fetching lambci/lambda:java8 Docker container image...... 2019-07-26 15:49:13 Mounting /tmp/tmpazHrq1 as /var/task:ro,delegated inside runtime container Jul 26, 2019 6:49:14 PM com.fasterxml.jackson.databind.ext.Java7Support <clinit> WARNING: Unable to load JDK7 types (annotations, java.nio.file.Path): no Java7 support added SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. START RequestId: d6387246-c75a-455e-a2dc-34fa2999eba6 Version: $LATEST software.amazon.awssdk.core.exception.SdkClientException: Unable to execute HTTP request: Connect to 127.0.0.1:8000 [/127.0.0.1] failed: Connection refused (Connection refused) at software.amazon.awssdk.core.exception.SdkClientException$BuilderImpl.build(SdkClientException.java:93) at software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage$RetryExecutor.handleThrownException(RetryableStage.java:170) at software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage$RetryExecutor.execute(RetryableStage.java:123) at software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage.execute(RetryableStage.java:69) at software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage.execute(RetryableStage.java:49) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.StreamManagingStage.execute(StreamManagingStage.java:57) at software.amazon.awssdk.core.internal.http.StreamManagingStage.execute(StreamManagingStage.java:42) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.stages.ExecutionFailureExceptionReportingStage.execute(ExecutionFailureExceptionReportingStage.java:37) at software.amazon.awssdk.core.internal.http.pipeline.stages.ExecutionFailureExceptionReportingStage.execute(ExecutionFailureExceptionReportingStage.java:25) at software.amazon.awssdk.core.internal.http.AmazonSyncHttpClient$RequestExecutionBuilderImpl.execute(AmazonSyncHttpClient.java:283) at software.amazon.awssdk.core.client.handler.BaseSyncClientHandler.invoke(BaseSyncClientHandler.java:91) at software.amazon.awssdk.core.client.handler.BaseSyncClientHandler.execute(BaseSyncClientHandler.java:103) at software.amazon.awssdk.core.client.handler.BaseSyncClientHandler.execute(BaseSyncClientHandler.java:68) at software.amazon.awssdk.core.client.handler.SdkSyncClientHandler.execute(SdkSyncClientHandler.java:44) at software.amazon.awssdk.awscore.client.handler.AwsSyncClientHandler.execute(AwsSyncClientHandler.java:53) at software.amazon.awssdk.services.dynamodb.DefaultDynamoDbClient.scan(DefaultDynamoDbClient.java:2456) at com.amazonaws.dao.OrderDao.getOrders(OrderDao.java:152) at com.amazonaws.handler.GetOrdersHandler.handleRequest(GetOrdersHandler.java:64) 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) Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:8000 [/127.0.0.1] failed: Connection refused (Connection refused) at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:159) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:373) 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 software.amazon.awssdk.http.apache.internal.conn.ClientConnectionManagerFactory$Handler.invoke(ClientConnectionManagerFactory.java:80) at com.sun.proxy.$Proxy0.connect(Unknown Source) at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) at software.amazon.awssdk.http.apache.internal.impl.ApacheSdkHttpClient.execute(ApacheSdkHttpClient.java:72) at software.amazon.awssdk.http.apache.ApacheHttpClient.execute(ApacheHttpClient.java:200) at software.amazon.awssdk.http.apache.ApacheHttpClient.access$400(ApacheHttpClient.java:92) at software.amazon.awssdk.http.apache.ApacheHttpClient$1.call(ApacheHttpClient.java:178) at software.amazon.awssdk.http.apache.ApacheHttpClient$1.call(ApacheHttpClient.java:175) at software.amazon.awssdk.core.internal.http.pipeline.stages.MakeHttpRequestStage.executeHttpRequest(MakeHttpRequestStage.java:58) at software.amazon.awssdk.core.internal.http.pipeline.stages.MakeHttpRequestStage.execute(MakeHttpRequestStage.java:50) at software.amazon.awssdk.core.internal.http.pipeline.stages.MakeHttpRequestStage.execute(MakeHttpRequestStage.java:34) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.RequestPipelineBuilder$ComposingRequestPipelineStage.execute(RequestPipelineBuilder.java:205) at software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage$RetryExecutor.doExecute(RetryableStage.java:145) at software.amazon.awssdk.core.internal.http.pipeline.stages.RetryableStage$RetryExecutor.execute(RetryableStage.java:111) ... 22 more Caused by: java.net.ConnectException: Connection refused (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75) at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)

I access to dynamodb shell via web browser to check if db is ok and it is up and running normally.

Any tip on this stuff ?
Thanks in advance.