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Posted to dev@parquet.apache.org by "Lawrence He (Jira)" <ji...@apache.org> on 2019/12/05 02:13:00 UTC
[jira] [Created] (PARQUET-1711) [parquet-protobuf] stack overflow
when work with well known json type
Lawrence He created PARQUET-1711:
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Summary: [parquet-protobuf] stack overflow when work with well known json type
Key: PARQUET-1711
URL: https://issues.apache.org/jira/browse/PARQUET-1711
Project: Parquet
Issue Type: Bug
Affects Versions: 1.10.1
Reporter: Lawrence He
Writing following protobuf message as parquet file is not possible:
{code:java}
syntax = "proto3";
import "google/protobuf/struct.proto";
package test;
option java_outer_classname = "CustomMessage";
message TestMessage {
map<string, google.protobuf.ListValue> data = 1;
} {code}
Protobuf introduced "well known json type" such like [ListValue|https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#listvalue] to work around json schema conversion.
However writing above messages traps parquet writer into an infinite loop due to the "general type" support in protobuf. Current implementation will keep referencing 6 possible types defined in protobuf (null, bool, number, string, struct, list) and entering infinite loop when referencing "struct".
{code:java}
java.lang.StackOverflowErrorjava.lang.StackOverflowError at java.base/java.util.Arrays$ArrayItr.<init>(Arrays.java:4418) at java.base/java.util.Arrays$ArrayList.iterator(Arrays.java:4410) at java.base/java.util.Collections$UnmodifiableCollection$1.<init>(Collections.java:1044) at java.base/java.util.Collections$UnmodifiableCollection.iterator(Collections.java:1043) at org.apache.parquet.proto.ProtoSchemaConverter.convertFields(ProtoSchemaConverter.java:64) at org.apache.parquet.proto.ProtoSchemaConverter.addField(ProtoSchemaConverter.java:96) at org.apache.parquet.proto.ProtoSchemaConverter.convertFields(ProtoSchemaConverter.java:66) at org.apache.parquet.proto.ProtoSchemaConverter.addField(ProtoSchemaConverter.java:96) at org.apache.parquet.proto.ProtoSchemaConverter.convertFields(ProtoSchemaConverter.java:66) at org.apache.parquet.proto.ProtoSchemaConverter.addField(ProtoSchemaConverter.java:96) at org.apache.parquet.proto.ProtoSchemaConverter.convertFields(ProtoSchemaConverter.java:66) at org.apache.parquet.proto.ProtoSchemaConverter.addField(ProtoSchemaConverter.java:96) at org.apache.parquet.proto.ProtoSchemaConverter.convertFields(ProtoSchemaConverter.java:66) at org.apache.parquet.proto.ProtoSchemaConverter.addField(ProtoSchemaConverter.java:96) {code}
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