Redshift 查询挂在 mule cloudhub 上

Question

我遇到了简单的 redshift 查询挂起的问题。我正在使用 mule 并将我的代码部署到 cloudhub。相信它与结果集大小有关。当结果集大小很小时，可能少于 50 行，它工作正常。但是，除此之外的任何内容似乎都挂起，我偶尔（在请求大约 2 小时后）会在日志中看到此错误。我将连接 url 用作：

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

顺便说一句，在我的本地 mule 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)
********************************************************************************

Answer 1

正如 Guy 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。

Redshift 查询挂在 mule cloudhub 上

Redshift query hangs on mule cloudhub

sql

mule

amazon-redshift

cloudhub