Help Center/ MapReduce Service/ FAQs/ Job Development/ What Should I Do If the Error Message "UnknownScannerExeception" Is Displayed for Spark Jobs?

Updated on 2023-10-19 GMT+08:00

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What Should I Do If the Error Message "UnknownScannerExeception" Is Displayed for Spark Jobs?

Symptom

Spark jobs run slowly. Warning information is printed in run logs, and the error cause is UnknownScannerExeception.

Solution

Before running a Spark job, adjust the value of hbase.client.scanner.timeout.period (for example, from 60 seconds to 120 seconds).

Log in to FusionInsight Manager and choose Cluster > Services > HBase. Click Configurations then All Configurations, search for hbase.client.scanner.timeout.period, and change its value to 120000 (unit: ms).

Parent topic: Job Development

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