jackjlli opened a new pull request #3758: Better handle NPE from getting instance config URL: https://github.com/apache/incubator-pinot/pull/3758 Currently when `PinotHelixResourceManager` tries to get a instance config which doesn't exist, it will throw an NPE. This PR explicitly logs the instance Id for better debugging. Current sample exception log (no instance information): ``` java.lang.NullPointerException at org.apache.helix.HelixProperty.<init>(HelixProperty.java:144) at org.apache.helix.model.InstanceConfig.<init>(InstanceConfig.java:76) at org.apache.pinot.controller.helix.core.PinotHelixResourceManager.getHelixInstanceConfig(PinotHelixResourceManager.java:289) at org.apache.pinot.controller.helix.core.PinotHelixResourceManager.getDataInstanceAdminEndpoints(PinotHelixResourceManager.java:2201) at org.apache.pinot.controller.util.TableSizeReader.getTableSubtypeSize(TableSizeReader.java:153) ``` New log: ``` Instance testInstance:1234_SERVER not found ```
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