tejaswini-imply opened a new pull request, #12827: URL: https://github.com/apache/druid/pull/12827
Fixes Historicals and MiddleManagers failing with `UnknownHostException` when working with the `druid-parquet-extensions` module and Ephemeral Hadoop cluster. ### Description: Druid services are failing with the following error during loading and configuring modules of the initialization phase in the case when `fs.defaultFS` URI value is specified while operating with an Ephemeral Hadoop cluster. While configuration HDFS DFS object is getting initialized with `fs.defaultFS` URI if present, which isn't getting resolved in case of Ephemeral cluster. Hence routed the initialization from `ParquetExtensionsModule` to `ParquetInputFormat` just before creating the `ParquetReader` object. This fix is similar to the one done for `OrcExtensionsModule` --> https://github.com/apache/druid/pull/12663, https://github.com/apache/druid/pull/12738 ``` An exception was caught and reported. Message: java.net.UnknownHostException: druid-dataproc-hadoop-cluster-us-east4-m at com.google.inject.util.Modules$OverrideModule.configure(Modules.java:198) Caused by: java.lang.IllegalArgumentException: java.net.UnknownHostException: druid-dataproc-hadoop-cluster-us-east4-m at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:417) at org.apache.hadoop.hdfs.NameNodeProxiesClient.createProxyWithClientProtocol(NameNodeProxiesClient.java:132) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:351) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:285) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:160) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2812) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:100) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2849) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2831) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:389) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:181) at org.apache.druid.data.input.parquet.ParquetExtensionsModule.configure(ParquetExtensionsModule.java:85) at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:340) at com.google.inject.spi.Elements.getElements(Elements.java:110) at com.google.inject.util.Modules$OverrideModule.configure(Modules.java:198) at com.google.inject.AbstractModule.configure(AbstractModule.java:62) at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:340) at com.google.inject.spi.Elements.getElements(Elements.java:110) at com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:138) at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:104) at com.google.inject.Guice.createInjector(Guice.java:99) at com.google.inject.Guice.createInjector(Guice.java:73) at com.google.inject.Guice.createInjector(Guice.java:62) at org.apache.druid.initialization.Initialization.makeInjectorWithModules(Initialization.java:451) at org.apache.druid.cli.GuiceRunnable.makeInjector(GuiceRunnable.java:93) at org.apache.druid.cli.GuiceRunnable.makeInjector(GuiceRunnable.java:86) at org.apache.druid.cli.CliPeon.run(CliPeon.java:302) at org.apache.druid.cli.Main.main(Main.java:113) Caused by: java.net.UnknownHostException: druid-dataproc-hadoop-cluster-us-east4-m ... 28 more ``` <hr/> #### Key classes changed: - `ParquetExtensionsModule` - `ParquetInputFormat` <hr/> This PR has: - [ ] been self-reviewed. - [ ] using the [concurrency checklist](https://github.com/apache/druid/blob/master/dev/code-review/concurrency.md) (Remove this item if the PR doesn't have any relation to concurrency.) - [ ] added documentation for new or modified features or behaviors. - [ ] added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links. - [ ] added or updated version, license, or notice information in [licenses.yaml](https://github.com/apache/druid/blob/master/dev/license.md) - [ ] added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader. - [ ] added unit tests or modified existing tests to cover new code paths, ensuring the threshold for [code coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md) is met. - [ ] added integration tests. - [ ] been tested in a test Druid cluster. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
