Flink 1.19: Run without Hadoop by Fokko · Pull Request #7369 · apache/iceberg

Fokko · 2023-04-18T10:32:56Z

Allow Flink to run without Hadoop

This PR aims to remove Hadoop's Configuration class from the main code path, so we can also run Flink without having the Hadoop JARs on the Java Classpath.

Python 3.9.19 (main, Mar 19 2024, 16:08:27) 
[Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyflink.datastream import StreamExecutionEnvironment
>>> env = StreamExecutionEnvironment.get_execution_environment()
>>> 
>>> env.add_jars("file:///Users/fokkodriesprong/Desktop/iceberg/flink/v1.19/flink-runtime/build/libs/iceberg-flink-runtime-1.19-1.6.0-SNAPSHOT.jar")
>>> env.add_jars("file:///Users/fokkodriesprong/Desktop/iceberg/aws-bundle/build/libs/iceberg-aws-bundle-1.6.0-SNAPSHOT.jar")
>>> 
>>> from pyflink.table import StreamTableEnvironment
>>> 
>>> table_env = StreamTableEnvironment.create(env)
>>> 
>>> table_env.execute_sql("""
...   CREATE CATALOG tabular WITH (
...       'type'='iceberg',
...       'catalog-type'='rest',
...       'uri'='https://api.tabular.io/ws/',
...       'credential'='abc',
...       'warehouse'='Fokko',
...       'io-impl'='org.apache.iceberg.aws.s3.S3FileIO',
...       'auth.default-refresh-enabled'='true'
...  )
... """).print()
OK
>>> 
>>> 
>>> table_env.execute_sql("USE CATALOG tabular").print()
OK
>>> table_env.execute_sql("SELECT * FROM examples.nyc_taxi_locations").print()
+----+-------------+--------------------------------+--------------------------------+
| op | location_id |                        borough |                      zone_name |
+----+-------------+--------------------------------+--------------------------------+
| +I |           1 |                            EWR |                 Newark Airport |
| +I |           2 |                         Queens |                    Jamaica Bay |
| +I |           3 |                          Bronx |        Allerton/Pelham Gardens |
...
| +I |         265 |                        Unknown |                             NA |
+----+-------------+--------------------------------+--------------------------------+
265 rows in set

Testing

Testing is still pending. This PR focusses on read operations. For write operations, upstream changes need to be done to Parquet-MR. With the main focus on the ParquetWriter class: https://github.com/apache/parquet-mr/blob/4bf606905924896403d25cd6287399cfe7050ce9/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetWriter.java#L25

Resolves #7332
Resolves #3117

Fokko · 2024-04-19T13:10:22Z

flink/v1.17/flink/src/main/java/org/apache/iceberg/flink/FlinkConfigOptions.java

      ConfigOptions.key("table.exec.iceberg.expose-split-locality-info")
          .booleanType()
-          .noDefaultValue()
+          .defaultValue(false)


This change is required:

py4j.protocol.Py4JJavaError: An error occurred while calling o42.executeSql. : java.lang.NoClassDefFoundError: org/apache/hadoop/conf/Configurable at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1022) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:555) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:594) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527) at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1022) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:555) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:594) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527) at org.apache.iceberg.hadoop.Util.usesHadoopFileIO(Util.java:122) at org.apache.iceberg.hadoop.Util.mayHaveBlockLocations(Util.java:92) at org.apache.iceberg.flink.source.SourceUtil.isLocalityEnabled(SourceUtil.java:43) at org.apache.iceberg.flink.source.FlinkSource$Builder.buildFormat(FlinkSource.java:260) at org.apache.iceberg.flink.source.FlinkSource$Builder.build(FlinkSource.java:272) at org.apache.iceberg.flink.source.IcebergTableSource.createDataStream(IcebergTableSource.java:128) at org.apache.iceberg.flink.source.IcebergTableSource.access$200(IcebergTableSource.java:55) at org.apache.iceberg.flink.source.IcebergTableSource$1.produceDataStream(IcebergTableSource.java:209) at org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecTableSourceScan.translateToPlanInternal(CommonExecTableSourceScan.java:163) at org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:168) at org.apache.flink.table.planner.plan.nodes.exec.ExecEdge.translateToPlan(ExecEdge.java:259) at org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecExchange.translateToPlanInternal(StreamExecExchange.java:99) at org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:168) at org.apache.flink.table.planner.plan.nodes.exec.ExecEdge.translateToPlan(ExecEdge.java:259) at org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecRank.translateToPlanInternal(StreamExecRank.java:205) at org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecLimit.translateToPlanInternal(StreamExecLimit.java:127) at org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:168) at org.apache.flink.table.planner.plan.nodes.exec.ExecEdge.translateToPlan(ExecEdge.java:259) at org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecSink.translateToPlanInternal(StreamExecSink.java:177) at org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:168) at org.apache.flink.table.planner.delegation.StreamPlanner.$anonfun$translateToPlan$1(StreamPlanner.scala:85) at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:233) at scala.collection.Iterator.foreach(Iterator.scala:937) at scala.collection.Iterator.foreach$(Iterator.scala:937) at scala.collection.AbstractIterator.foreach(Iterator.scala:1425) at scala.collection.IterableLike.foreach(IterableLike.scala:70) at scala.collection.IterableLike.foreach$(IterableLike.scala:69) at scala.collection.AbstractIterable.foreach(Iterable.scala:54) at scala.collection.TraversableLike.map(TraversableLike.scala:233) at scala.collection.TraversableLike.map$(TraversableLike.scala:226) at scala.collection.AbstractTraversable.map(Traversable.scala:104) at org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:84) at org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:180) at org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:1296) at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeInternal(TableEnvironmentImpl.java:1138) at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeSql(TableEnvironmentImpl.java:735) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.flink.api.python.shaded.py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244) at org.apache.flink.api.python.shaded.py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:374) at org.apache.flink.api.python.shaded.py4j.Gateway.invoke(Gateway.java:282) at org.apache.flink.api.python.shaded.py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) at org.apache.flink.api.python.shaded.py4j.commands.CallCommand.execute(CallCommand.java:79) at org.apache.flink.api.python.shaded.py4j.GatewayConnection.run(GatewayConnection.java:238) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.conf.Configurable at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:594) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527) ... 67 more

…optional

This reverts commit c088745.

…optional

Fokko · 2024-06-28T10:44:35Z

@stevenzwu @pvary do you have time to get some eyes on this one?

pvary · 2024-06-28T17:22:50Z

core/src/main/java/org/apache/iceberg/SerializableTable.java


  private FileIO fileIO(Table table) {
-    if (table.io() instanceof HadoopConfigurable) {
+    if (HadoopDependency.isHadoopCommonOnClasspath(SerializableTable.class.getClassLoader())


What happens when the hadoop is not on the classpath, but the table is HadoopConfigurable?

No configuration will be passed through.

pvary · 2024-06-28T17:25:48Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/FlinkCatalogFactory.java

-          "There should be a hive-site.xml file under the directory %s",
-          hiveConfDir);
-      newConf.addResource(new Path(hiveConfDir, "hive-site.xml"));
+  public static Object clusterHadoopConf() {


Is this better in the HadoopUtil?

pvary · 2024-06-28T17:27:07Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/FlinkDynamicTableFactory.java


-    org.apache.hadoop.conf.Configuration hadoopConf = FlinkCatalogFactory.clusterHadoopConf();
+    org.apache.hadoop.conf.Configuration hadoopConf =
+        (org.apache.hadoop.conf.Configuration) FlinkCatalogFactory.clusterHadoopConf();


So FlinkSQL will still need hadoop on the classpath?

agree with Peter that this seems problematic, as the return value can be null

pvary · 2024-06-28T17:28:40Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/TableLoader.java

  }

-  static TableLoader fromHadoopTable(String location, Configuration hadoopConf) {
+  static TableLoader fromHadoopTable(String location, Object hadoopConf) {


I hate this part of the change.
We have a public API where type is not defined.
Do we have any better solution for this?

What do you think of the ParquetConfiguration that Parquet-Java did: apache/parquet-java#1141 ?

it seems quite a bit of effort to define a IcebergHadoopConfiguration class like parquet-java.

another possible option is to add a new overloaded method with Flink Configuration arg. Flink provides a util method for the conversion.

public class HadoopUtils { @SuppressWarnings("deprecation") public static Configuration getHadoopConfiguration( org.apache.flink.configuration.Configuration flinkConfiguration)

core/src/main/java/org/apache/iceberg/hadoop/SerializableConfiguration.java

gaborgsomogyi · 2024-06-29T21:06:48Z

core/src/main/java/org/apache/iceberg/hadoop/SerializableConfiguration.java

+  public SerializableConfiguration(Object hadoopConf) {
+    this.hadoopConf = (Configuration) hadoopConf;
+  }


What's the point here? When there's no Hadoop one classpath then it will blow up no matter what, right?
Additionally explicit casts are just brittle. This question applies to all other such places where Object is passed.
In Flink this is solved in a way that Hadoop specific class usages are protected with isHadoopCommonOnClasspath and that's it, works like charm.

I am also interested in the answer to Gabor's question.

also wondering if we can get overload ambiguity from the two constructors?

pvary · 2024-07-01T05:00:05Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/FlinkConfigOptions.java

      ConfigOptions.key("table.exec.iceberg.expose-split-locality-info")
          .booleanType()
-          .noDefaultValue()
+          .defaultValue(false)


This is a backwards incompatible change. I'm not sure how widely it's used, but we need to bdo some research and be more vocal about this change, if we decide to go ahead with it.

agree with @pvary that this changes the default behavior, which calls Util.mayHaveBlockLocations(table.io(), table.location()) from Hadoop module to figure out if locality is enabled for hdfs scheme.

would it work if we add the isHadoopCommonOnClasspath check at the beginning of the Util#mayHaveBlockLocations class in Hadoop module? return false if Hadoop common not on class path?

public static boolean mayHaveBlockLocations(FileIO io, String location) { if (usesHadoopFileIO(io, location)) { InputFile inputFile = io.newInputFile(location); if (inputFile instanceof HadoopInputFile) { String scheme = ((HadoopInputFile) inputFile).getFileSystem().getScheme(); return LOCALITY_WHITELIST_FS.contains(scheme); } else { return false; } } return false; }

stevenzwu · 2024-07-02T04:00:35Z

core/src/main/java/org/apache/iceberg/hadoop/SerializableConfiguration.java

    return hadoopConf;
  }
+
+  public Configuration getClone() {


maybe name this method just as config().

getCone can look like a clone of this SeriazableConfiguration class.

stevenzwu · 2024-07-02T04:10:46Z

core/src/main/java/org/apache/iceberg/hadoop/SerializableConfiguration.java

+  public SerializableConfiguration(Object hadoopConf) {
+    this.hadoopConf = (Configuration) hadoopConf;
+  }


I am also interested in the answer to Gabor's question.

also wondering if we can get overload ambiguity from the two constructors?

stevenzwu · 2024-07-02T07:41:01Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/FlinkDynamicTableFactory.java


-    org.apache.hadoop.conf.Configuration hadoopConf = FlinkCatalogFactory.clusterHadoopConf();
+    org.apache.hadoop.conf.Configuration hadoopConf =
+        (org.apache.hadoop.conf.Configuration) FlinkCatalogFactory.clusterHadoopConf();


agree with Peter that this seems problematic, as the return value can be null

stevenzwu · 2024-07-02T09:06:44Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/FlinkConfigOptions.java

      ConfigOptions.key("table.exec.iceberg.expose-split-locality-info")
          .booleanType()
-          .noDefaultValue()
+          .defaultValue(false)


agree with @pvary that this changes the default behavior, which calls Util.mayHaveBlockLocations(table.io(), table.location()) from Hadoop module to figure out if locality is enabled for hdfs scheme.

would it work if we add the isHadoopCommonOnClasspath check at the beginning of the Util#mayHaveBlockLocations class in Hadoop module? return false if Hadoop common not on class path?

public static boolean mayHaveBlockLocations(FileIO io, String location) { if (usesHadoopFileIO(io, location)) { InputFile inputFile = io.newInputFile(location); if (inputFile instanceof HadoopInputFile) { String scheme = ((HadoopInputFile) inputFile).getFileSystem().getScheme(); return LOCALITY_WHITELIST_FS.contains(scheme); } else { return false; } } return false; }

stevenzwu · 2024-07-02T09:14:16Z

flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/TableLoader.java

  }

-  static TableLoader fromHadoopTable(String location, Configuration hadoopConf) {
+  static TableLoader fromHadoopTable(String location, Object hadoopConf) {


it seems quite a bit of effort to define a IcebergHadoopConfiguration class like parquet-java.

another possible option is to add a new overloaded method with Flink Configuration arg. Flink provides a util method for the conversion.

public class HadoopUtils { @SuppressWarnings("deprecation") public static Configuration getHadoopConfiguration( org.apache.flink.configuration.Configuration flinkConfiguration)

github-actions · 2024-08-29T00:14:08Z

This pull request has been marked as stale due to 30 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@iceberg.apache.org list. Thank you for your contributions.

github-actions · 2024-09-05T00:14:16Z

This pull request has been closed due to lack of activity. This is not a judgement on the merit of the PR in any way. It is just a way of keeping the PR queue manageable. If you think that is incorrect, or the pull request requires review, you can revive the PR at any time.

skyahead · 2025-01-15T17:19:21Z

@Fokko I wonder why this is closed. I face this issue when submitting jobs to AWS managed Flink.

vbabenkoru · 2025-04-09T17:31:22Z

Same, for some reason Flink requires Hadoop and yet does not come with it? We're using the Kubernetes Operator and would like to avoid customizing the image to fix this bug.

gphilipp · 2025-06-12T08:17:30Z

What was the last status for this PR, as in, how much work is left before it can be reviewed?

github-actions bot added build core flink parquet labels Apr 18, 2023

nastra mentioned this pull request May 1, 2023

Core: Remove compile-time dependency to ResolvingFileIO #7488

Merged

Fokko marked this pull request as ready for review June 26, 2023 08:05

Fokko force-pushed the fd-make-hadoop-optional branch from 7b88a34 to 4bf96fc Compare June 26, 2023 08:05

Fokko mentioned this pull request Aug 9, 2023

PARQUET-2336: Add caching key to CodecFactory apache/parquet-java#1134

Merged

4 tasks

Fokko mentioned this pull request Apr 17, 2024

Flink: Decouple the iceberg integration work from hadoop libraries #3117

Closed

Fokko changed the title ~~Flink: Run without Hadoop~~ Flink 1.19: Run without Hadoop Apr 19, 2024

Fokko commented Apr 19, 2024

View reviewed changes

Fokko force-pushed the fd-make-hadoop-optional branch 9 times, most recently from 16681f2 to dbe6ecb Compare April 22, 2024 15:01

Flink: Allow running without Hadoop

b4d3887

Fokko force-pushed the fd-make-hadoop-optional branch from dbe6ecb to b4d3887 Compare April 22, 2024 16:02

Fokko added 5 commits April 23, 2024 14:03

WIP

c088745

Merge branch 'main' of github.com:apache/iceberg into fd-make-hadoop-…

b4df442

…optional

Fix Checkstyle

9debe7d

Revert "WIP"

fc52d5a

This reverts commit c088745.

Oops

bf64429

Fokko force-pushed the fd-make-hadoop-optional branch from 857e208 to bf64429 Compare May 22, 2024 18:08

Fokko added this to the Iceberg 1.6.0 milestone May 22, 2024

Merge branch 'main' of github.com:apache/iceberg into fd-make-hadoop-…

c546668

…optional

jbonofre approved these changes Jun 25, 2024

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Fokko requested review from pvary and stevenzwu June 28, 2024 10:44

pvary reviewed Jun 28, 2024

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core/src/main/java/org/apache/iceberg/hadoop/SerializableConfiguration.java Show resolved Hide resolved

gaborgsomogyi reviewed Jun 29, 2024

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pvary reviewed Jul 1, 2024

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Fokko removed this from the Iceberg 1.6.0 milestone Jul 2, 2024

stevenzwu reviewed Jul 2, 2024

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mgmarino mentioned this pull request Jul 19, 2024

Unable to use GlueCatalog in flink environments without hadoop #3044

Closed

Fokko mentioned this pull request Aug 28, 2024

Core: fix NPE with HadoopFileIO because FileIOParser doesn't serialize Hadoop configuration #10926

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github-actions bot closed this Sep 5, 2024

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Fokko commented Apr 18, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Allow Flink to run without Hadoop

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Fokko commented Jun 28, 2024

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Fokko commented Apr 18, 2023 •

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