Alexander Filipchik created HUDI-1602:
-----------------------------------------

             Summary: Corrupted Avro schema extracted from parquet file
                 Key: HUDI-1602
                 URL: https://issues.apache.org/jira/browse/HUDI-1602
             Project: Apache Hudi
          Issue Type: Bug
            Reporter: Alexander Filipchik


we are running a HUDI deltastreamer on a very complex stream. Schema is deeply 
nested, with several levels of hierarchy (avro schema is around 6600 LOC).

 

The version of HUDI that writes the dataset if 0.5-SNAPTHOT and we recently 
started attempts to upgrade to the latest. Hovewer, latest HUDI can't read the 
provided dataset. Exception I get: 

 

 
{code:java}
Got exception while parsing the arguments:Got exception while parsing the 
arguments:Found recursive reference in Avro schema, which can not be processed 
by Spark:{  "type" : "record",  "name" : "array",  "fields" : [ {    "name" : 
"id",    "type" : [ "null", "string" ],    "default" : null  }, {    "name" : 
"type",    "type" : [ "null", "string" ],    "default" : null  }, {    "name" : 
"exist",    "type" : [ "null", "boolean" ],    "default" : null  } ]}          
Stack trace:org.apache.spark.sql.avro.IncompatibleSchemaException:Found 
recursive reference in Avro schema, which can not be processed by Spark:{  
"type" : "record",  "name" : "array",  "fields" : [ {    "name" : "id",    
"type" : [ "null", "string" ],    "default" : null  }, {    "name" : "type",    
"type" : [ "null", "string" ],    "default" : null  }, {    "name" : "exist",   
 "type" : [ "null", "boolean" ],    "default" : null  } ]}
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:75)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:89)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:105)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:82)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:81)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at scala.collection.Iterator$class.foreach(Iterator.scala:891) at 
scala.collection.AbstractIterator.foreach(Iterator.scala:1334) at 
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at 
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:234) at 
scala.collection.AbstractTraversable.map(Traversable.scala:104) at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:81)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:105)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:82)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:81)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at scala.collection.Iterator$class.foreach(Iterator.scala:891) at 
scala.collection.AbstractIterator.foreach(Iterator.scala:1334) at 
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at 
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:234) at 
scala.collection.AbstractTraversable.map(Traversable.scala:104) at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:81)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:105)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:82)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:81)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at scala.collection.Iterator$class.foreach(Iterator.scala:891) at 
scala.collection.AbstractIterator.foreach(Iterator.scala:1334) at 
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at 
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:234) at 
scala.collection.AbstractTraversable.map(Traversable.scala:104) at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:81)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:89)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:105)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:82)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:81)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at scala.collection.Iterator$class.foreach(Iterator.scala:891) at 
scala.collection.AbstractIterator.foreach(Iterator.scala:1334) at 
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at 
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:234) at 
scala.collection.AbstractTraversable.map(Traversable.scala:104) at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:81)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:105)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:82)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:81)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at scala.collection.Iterator$class.foreach(Iterator.scala:891) at 
scala.collection.AbstractIterator.foreach(Iterator.scala:1334) at 
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at 
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:234) at 
scala.collection.AbstractTraversable.map(Traversable.scala:104) at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:81)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:105)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:82)
 at 
org.apache.spark.sql.avro.SchemaConverters$$anonfun$1.apply(SchemaConverters.scala:81)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
 at scala.collection.Iterator$class.foreach(Iterator.scala:891) at 
scala.collection.AbstractIterator.foreach(Iterator.scala:1334) at 
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at 
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at 
scala.collection.TraversableLike$class.map(TraversableLike.scala:234) at 
scala.collection.AbstractTraversable.map(Traversable.scala:104) at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlTypeHelper(SchemaConverters.scala:81)
 at 
org.apache.spark.sql.avro.SchemaConverters$.toSqlType(SchemaConverters.scala:46)
 at 
org.apache.hudi.AvroConversionUtils$.convertAvroSchemaToStructType(AvroConversionUtils.scala:56)
 at 
org.apache.hudi.MergeOnReadSnapshotRelation.<init>(MergeOnReadSnapshotRelation.scala:67)
 at org.apache.hudi.DefaultSource.createRelation(DefaultSource.scala:89) at 
org.apache.hudi.DefaultSource.createRelation(DefaultSource.scala:53) at 
org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:318)
 at 
org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:223) at 
org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:211) at 
org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:178) at 
com.css.dw.spark.SQLHudiOutputJob.run(SQLHudiOutputJob.java:118) at 
com.css.dw.spark.SQLHudiOutputJob.main(SQLHudiOutputJob.java:164) at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498) at 
org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) at 
org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:845)
 at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:161) at 
org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:184) at 
org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:86) at 
org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:920) at 
org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:929) at 
org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
{code}
 

I wrote a simple test that opens parquet file, loads schema, and attempts to 
convert it into avro and it does fail with the same error. It appears that Avro 
schema that looked like:

 
{noformat}
{
          "name": "entity_path",
          "type": [
            "null",
            {
              "type": "record",
              "name": "MenuEntityPath",
              "fields": [
                {
                  "name": "path_nodes",
                  "type": [
                    "null",
                    {
                      "type": "array",
                      "items": {
                        "type": "record",
                        "name": "PathNode",
                        "namespace": "Menue_pathPath$",
                        "fields": [
                          {
                            "name": "id",
                            "type": [
                              "null",
                              {
                                "type": "string",
                                "avro.java.string": "String"
                              }
                            ],
                            "default": null
                          },
                          {
                            "name": "type",
                            "type": [
                              "null",
                              {
                                "type": "enum",
                                "name": "MenuEntityType",
                                "namespace": "shared",
                                "symbols": [
                                  "UNKNOWN"
                                ]
                              }
                            ],
                            "default": null
                          }
                        ]
                      }
                    }
                  ],
                  "default": null
                }
              ]
            }
          ],
          "default": null
        }
      ]
    }
  ],
  "default": null
},{noformat}
Is converted into:
{noformat}
[
  "null",
  {
    "type": "record",
    "name": "entity_path",
    "fields": [
      {
        "name": "path_nodes",
        "type": [
          "null",
          {
            "type": "array",
            "items": {
              "type": "record",
              "name": "array",
              "fields": [
                {
                  "name": "id",
                  "type": [
                    "null",
                    "string"
                  ],
                  "default": null
                },
                {
                  "name": "type",
                  "type": [
                    "null",
                    "string"
                  ],
                  "default": null
                },
                {
                  "name": "exist",
                  "type": [
                    "null",
                    "boolean"
                  ],
                  "default": null
                }
              ]
            }
          }
        ],
        "default": null
      },
      {
        "name": "exist",
        "type": [
          "null",
          "boolean"
        ],
        "default": null
      }
    ]
  }
]{noformat}
Couple of questions: did anyone have similar issues and what is the best way 
forward?

 



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