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# troubleshootings
Slackbot
02/08/2023, 4:46 PMThis message was deleted.
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sridhara
02/08/2023, 4:52 PM Copy code
2023-02-08T15:59:41,750 WARN [HttpClient-Netty-Boss-0] org.jboss.netty.channel.SimpleChannelUpstreamHandler - EXCEPTION, please implement org.jboss.netty.handler.codec.http.HttpContentDecompressor.exceptionCaught() for proper handling.
java.net.ConnectException: Connection refused: /10.150.53.58:8083v
Vino V
03/19/2023, 2:03 PMhi I was wondering if this issue got some traction? I m experiencing same issue just wanted to hear how this is sorted where to look for fix.
b
Brandon Tan
03/20/2023, 1:05 AMHeavy groupby queries could be a possibility ; need to ensure you have enough heap + direct memory on your brokers