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From Jeszy <>
Subject Re: HDFS timeout setting
Date Sat, 09 Sep 2017 06:41:19 GMT
Hello Nasron,

The read hanging is an HDFS timeout issue, to work around it you would
need an HDFS version which has HADOOP-12672. After that, you should be
able to set to a reasonable value in
Impala's HDFS client settings.


On 8 September 2017 at 20:24, Nasron Cheong <> wrote:
> We encountered an issue where our hdfs cluster misbehaved, which resulted in
> very slow reads. However, existing impala queries would continue even if
> cancelled, presumably being blocked by the hdfs read.
> Are there settings to be less aggressive on hdfs reads so we can fail more
> quickly if hdfs is the issue?
> Thanks.
> - Nasron

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