[jira] [Created] (FLINK-9784) Inconsistent use of 'static' in AsyncIOExample.java

["Alexei Nekrassov (JIRA)" <ji...@apache.org>]

Alexei Nekrassov created FLINK-9784:
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             Summary: Inconsistent use of 'static' in AsyncIOExample.java
                 Key: FLINK-9784
                 URL: https://issues.apache.org/jira/browse/FLINK-9784
             Project: Flink
          Issue Type: Bug
          Components: Examples
    Affects Versions: 1.4.2, 1.5.0
            Reporter: Alexei Nekrassov


In SampleAsyncFunction having _executorService_ and _random_ as static, but _counter_ as instance-specific will not work when someone creates a second instance of SampleAsyncFunction. In second SampleAsyncFunction the _counter_ will be 0 and we will re-intialize static _executorService_ and _random_, thus interfering with the first SampleAsyncFunction object.

To fix this example and make it clearer, make _executorService_ and _random_ instance-specific. That will make _counter_ redundant; also synchronization on class will no longer be needed.



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