从AWS Java客户端未知的主机异常？ [英] Unknown Host exception from the AWS Java client?

问题描述

有过这个例外，其他人跑？我们昨晚在负载测试过程中看到它。该主机名是否正确，正常工作正常。这只是开始，昨晚抛出此异常。无论它是一个随机的DNS故障的amanzon的部分或AWS的Java SDK做了一些负载下出人意料。

 ＆GT;的java.net.UnknownHostException：产生的原因sdb.amazonaws.com
    在java.net.Inet6AddressImpl.lookupAllHostAddr（本机方法）
    在java.net.InetAddress中的$ 1.lookupAllHostAddr（InetAddress.java:867）
    在java.net.InetAddress.getAddressFromNameService（InetAddress.java:1246）
    在java.net.InetAddress.getAllByName0（InetAddress.java:1197）
    在java.net.InetAddress.getAllByName（InetAddress.java:1128）
    在java.net.InetAddress.getAllByName（InetAddress.java:1064）
    在org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:242)
    在org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:130)
    在org.apache.http.impl.conn.AbstractPoolEntry.open（AbstractPoolEntry.java:149）
    在org.apache.http.impl.conn.AbstractPooledConnAdapter.open（AbstractPooledConnAdapter.java:121）
    在org.apache.http.impl.client.DefaultRequestDirector.tryConnect（DefaultRequestDirector.java:561）
    在org.apache.http.impl.client.DefaultRequestDirector.execute（DefaultRequestDirector.java:415）
    在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:820）
    在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:754）
    在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:732）
    在com.amazonaws.http.AmazonHttpClient.executeHelper（AmazonHttpClient.java:266）
 

解决方案

修改/ etc / hosts中通过以下方式：
老
127.0.0.1本地主机的localhost.localdomain
新
127.0.0.1本地主机的localhost.localdomain附加您-本地主机名，在这里

Has anyone else run across this exception? We saw it during a load test last night. The hostname is correct and normally works fine. It just started throwing this exception last night. Either it was a random DNS fail on amanzon's part or the Aws SDK for Java does something unexpected under load.

> Caused by: java.net.UnknownHostException: sdb.amazonaws.com
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
    at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
    at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
    at java.net.InetAddress.getAllByName(InetAddress.java:1128)
    at java.net.InetAddress.getAllByName(InetAddress.java:1064)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:242)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:130)
    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:149)
    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:121)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:561)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:415)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:820)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:732)
    at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:266)

解决方案

Change /etc/hosts the following way:
old
127.0.0.1 localhost localhost.localdomain
new
127.0.0.1 localhost localhost.localdomain add-your-localhost-name-here

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