pkuwm opened a new issue #1105:
URL: https://github.com/apache/helix/issues/1105
When a Znode's data is NOT compressed by Helix gzip util but other
compression lib like zlib, PropertyStoreAccessor and propertystore endpoint
could not handle the decompression. Users would expect to keep the compressed
data as a return and decompress it on users side.
```
2020/06/19 00:03:18.519 ERROR [ZNRecordSerializer] [qtp609438896-279004]
[helix-rest] [] Exception during deserialization of bytes: x???[o?F???+
=w???o???
org.codehaus.jackson.JsonParseException: Unexpected character ('x' (code
120)): expected a valid value (number, String, array, object, 'true', 'false'
or 'null')
at [Source: java.io.ByteArrayInputStream@6fc4c1e3; line: 1, column: 2]
at org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1433)
at
org.codehaus.jackson.impl.JsonParserMinimalBase._reportError(JsonParserMinimalBase.java:521)
at
org.codehaus.jackson.impl.JsonParserMinimalBase._reportUnexpectedChar(JsonParserMinimalBase.java:442)
at
org.codehaus.jackson.impl.Utf8StreamParser._handleUnexpectedValue(Utf8StreamParser.java:2090)
at
org.codehaus.jackson.impl.Utf8StreamParser._nextTokenNotInObject(Utf8StreamParser.java:606)
at
org.codehaus.jackson.impl.Utf8StreamParser.nextToken(Utf8StreamParser.java:492)
at
org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2770)
at
org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2718)
at
org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1909)
at
org.apache.helix.zookeeper.datamodel.serializer.ZNRecordSerializer.deserialize(ZNRecordSerializer.java:137)
at
org.apache.helix.rest.server.resources.helix.PropertyStoreAccessor.getPropertyByPath(PropertyStoreAccessor.java:73)
```
Solution:
We should check the data is compressed by ZNRecord serializer. If not, we
should not try to deserialize it but return the data directly to users.
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