city in 2.13.0 cannot handle a certain address 132.248.1.0

[miniway]

city function in 2.13.0 cannot handle a certain address 132.248.1.0

Caused by: java.nio.charset.MalformedInputException: Input length = 1
	at java.nio.charset.CoderResult.throwException(CoderResult.java:281)
	at java.nio.charset.CharsetDecoder.decode(CharsetDecoder.java:816)
	at com.maxmind.db.Decoder.decodeString(Decoder.java:184)
	at com.maxmind.db.Decoder.decodeByType(Decoder.java:159)
	at com.maxmind.db.Decoder.decode(Decoder.java:146)
	at com.maxmind.db.Decoder.decodeMap(Decoder.java:278)
	at com.maxmind.db.Decoder.decodeByType(Decoder.java:153)
	at com.maxmind.db.Decoder.decode(Decoder.java:146)
	at com.maxmind.db.Decoder.decode(Decoder.java:88)
	at com.maxmind.db.Reader.resolveDataPointer(Reader.java:256)
	at com.maxmind.db.Reader.getRecord(Reader.java:176)
	at com.maxmind.geoip2.DatabaseReader.get(DatabaseReader.java:271)
	at com.maxmind.geoip2.DatabaseReader.getOrThrowException(DatabaseReader.java:240)
	at com.maxmind.geoip2.DatabaseReader.city(DatabaseReader.java:328)

It works in 2.9.0.

[oschwald]

It sounds like your database is corrupt. What database and what is the release date for it? Are you storing your database in a JAR file?

[miniway]

I used the same data file which is not included in jar both for 2.9 and 2.13.

I verified the checksum after I downloaded the city datafile. If the database is corrupted, should it fail at the both versions?

[oschwald]

The code that the exception is coming from has not changed between 2.9 and 2.13. In order to diagnose what is going on, I would need the database information I asked for and preferably a complete code sample that demonstrates the issue.

[miniway]

I downloaded the data-file yesterday (Mar 1st, 2020) again. But the symptom was the same. Due to the data size of database and dependency files, I've uploaded a reproducible code to the Dropbox
9.sh and 13.sh will execute the code per each version.

[oschwald]

Thanks. I am able to reproduce the issue with your test case. We'll take a look

Could you remove the file from your Dropbox share given that it has a database in it?

[oschwald]

Thanks for reporting. This has been fixed in maxmind-db 1.3.1. geoip2 2.13.1 should pull in that fix.