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我面临一个简单的红移查询挂起的问题。我正在使用 mule 并将我的代码部署到 cloudhub。相信这与结果集的大小有关。当结果集大小非常小时，可能少于 50 行时，它可以正常工作。但是，除此之外的任何东西似乎都挂起，我偶尔（大约 2 小时的请求后）会在日志中看到此错误。我将连接网址用作：

jdbc:postgresql://xyz?tcpKeepAlive=true&useCursors=true&user=abc&password=123

顺便说一句，在我的本地骡子运行时一切正常。

********************************************************************************
Message               : [Amazon](500150) Error setting/closing connection: Connection reset by peer. (java.sql.SQLException). Message payload is of type: ParameterMap
Code                  : MULE_ERROR-29999
--------------------------------------------------------------------------------
Exception stack is:
1. [Amazon](500150) Error setting/closing connection: Connection reset by peer. (com.amazon.support.exceptions.GeneralException)
  com.amazon.jdbc.communications.channels.MessagesSocketChannel:-1 (null)
2. [Amazon](500150) Error setting/closing connection: Connection reset by peer. (java.sql.SQLException)
  com.amazon.jdbc.communications.channels.MessagesSocketChannel:-1 (null)
3. [Amazon](500150) Error setting/closing connection: Connection reset by peer. (java.sql.SQLException). Message payload is of type: ParameterMap (org.mule.api.MessagingException)
  org.mule.module.db.internal.processor.AbstractDbMessageProcessor:93 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/MessagingException.html)
--------------------------------------------------------------------------------
Root Exception stack trace:
com.amazon.support.exceptions.GeneralException: [Amazon](500150) Error setting/closing connection: Connection reset by peer.
    at com.amazon.jdbc.communications.channels.MessagesSocketChannel.readMessages(Unknown Source)
    at com.amazon.jdbc.communications.channels.AbstractMessagesSocketChannel.read(Unknown Source)
    + 2 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
********************************************************************************
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1 回答 1

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正如盖伊在评论中提到的，问题似乎是使用固定 MTU 的 Redshift。

有关详细信息，请参阅 MuleSoft 知识库文章Mule application hangs on database select or insert when using Postgres on AWS Redshift。

于 2018-11-03T12:02:44.427 回答