[AVRO-3129] NPE validating schema with enum types

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.10.2
• Fix Version/s: 1.11.0
• Component/s: java
• Assignee: Fokko Driesprong
• Reporter: Ravindranath Kakarla
• Created: 29/Apr/21 21:40
• Updated: 14/Sep/22 10:25
• Resolved: 14/Sep/22 10:25

Description

I ran into a bug with schema validation code that throws unexpected NullPointerException when validating a schema with enum type. The bug is present in latest version of Avro Java API.

Schema to replicate issue: 

{ "type": "enum", "name": "Suit", "symbols" : [null] }

Replication Steps:

1. Validate the above schema using Java API.
2. I used avro-cli for testing but was also able to replicate with API.
3. java -jar avro-cli-0.2.7.jar normalize -s ~/tmp/schema.txt

Exception:

java.lang.NullPointerException: nullat org.apache.avro.Schema.validateName(Schema.java:1557) ~[avro-1.10.2.jar:1.10.2]
at org.apache.avro.Schema.access$400(Schema.java:91) ~[avro-1.10.2.jar:1.10.2]
at org.apache.avro.Schema$EnumSchema.<init>(Schema.java:1035) ~[avro-1.10.2.jar:1.10.2]
at org.apache.avro.Schema.parse(Schema.java:1709) ~[avro-1.10.2.jar:1.10.2]
at org.apache.avro.Schema.parse(Schema.java:1673) ~[avro-1.10.2.jar:1.10.2]
at org.apache.avro.Schema$Parser.parse(Schema.java:1430) ~[avro-1.10.2.jar:1.10.2]
at org.apache.avro.Schema$Parser.parse(Schema.java:1418) ~[avro-1.10.2.jar:1.10.2]

 

As seen in the code, there is no null check on symbol which is causing this.