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Posted to issues@flink.apache.org by "Yuxin Tan (Jira)" <ji...@apache.org> on 2023/03/10 08:30:00 UTC

[jira] [Created] (FLINK-31396) Occasional inaccurate timeout time calculation with System.nanotime in batch read buffer pool

Yuxin Tan created FLINK-31396:
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             Summary: Occasional inaccurate timeout time calculation with System.nanotime in batch read buffer pool
                 Key: FLINK-31396
                 URL: https://issues.apache.org/jira/browse/FLINK-31396
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Network
            Reporter: Yuxin Tan


When running TPC-DS tests, I encountered the read buffer request timeout because of configuring too less read buffers. But I found the timeout time may be less than 5m occasionally, 5m is the expected time. 
I read the docs of System.nanotime, the docs say that  t1 < t0 should not be used, because of the possibility of numerical overflow. I tested the System.currentTimeMillis and it can work as expected.



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