Java не удалось разрешить DNS до первого пинга из ОС - PullRequest
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Java не удалось разрешить DNS до первого пинга из ОС

0 голосов
/ 23 октября 2019

Java не удалось разрешить один хост (через AWS SDK): 

java.net.UnknownHostException: somebucket.s3.amazonaws.com
    at java.net.InetAddress.getAllByName0(InetAddress.java:1281)
    at java.net.InetAddress.getAllByName(InetAddress.java:1193)
    at java.net.InetAddress.getAllByName(InetAddress.java:1127)
    at com.amazonaws.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:27)
    at com.amazonaws.http.DelegatingDnsResolver.resolve(DelegatingDnsResolver.java:38)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:112)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:359)
    at sun.reflect.GeneratedMethodAccessor52.invoke
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.amazonaws.http.conn.ClientConnectionManagerFactory$Handler.invoke(ClientConnectionManagerFactory.java:76)
    at com.amazonaws.http.conn.$Proxy9.connect
    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 com.amazonaws.http.apache.client.impl.SdkHttpClient.execute(SdkHttpClient.java:72)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1235)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1055)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:743)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:717)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:699)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:667)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:649)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:513)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4247)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4194)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4188)
    at com.amazonaws.services.s3.AmazonS3Client.listObjects(AmazonS3Client.java:823)
    // application code which called listObjects()

Эта ошибка была постоянной до первого пинга к этому хосту: 

ping somebucket.s3.amazonaws.com

После ping thisошибка была исправленаПриложение работает в Dokku с java8-buildpack: Java: OpenJDK-1.8.0_222 AWS SDK: 1.11.211

Почему это происходит и как этого избежать в будущем?

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