Thanks! I was planning to patch the test, I didn’t actually research when it broke or why… thanks for doing that! I also didn’t think about the implications of the INSERT JSON path…
> On Oct 29, 2026, at 11:22 AM, Dmitry Konstantinov <[email protected]> wrote: > > Hi all, > > CASSANDRA-20848 upgraded jackson-core from 2.13.2 to 2.19.2 (released in > 4.0.19, 4.1.10, 5.0.6). > Our JSON mapper uses Jackson's default StreamReadConstraints. > As a result, INSERT JSON and fromJson() now reject values that SELECT JSON / > toJson() produce: > - map key with JSON text > 50,000 chars (maxNameLength). Non-text keys > (frozen collections, tuples, UDTs, blobs) are serialized as quoted JSON, > so nested keys reach this size quickly. > - varint/decimal > 1,000 digits (maxNumberLength) > - blob >= 10,000,000 bytes, i.e. hex string > 20M chars (maxStringLength) > > Example error: > StreamConstraintsException: Name length (50722) exceeds the maximum allowed > (50000) > > This was found by the flaky AbstractTypeTest.json test: > https://ci-cassandra.apache.org/job/Cassandra-trunk/2642/testReport/junit/org.apache.cassandra.db.marshal/AbstractTypeTest/Tests___test_system_keyspace_directory_jdk21_6_20___json_system_keyspace_directory_jdk21_x86_64/ > > Are we OK with keeping Jackson's defaults? If so, I will fix the test to stay > within these limits. > Also, there is currently no way to change these limits without a code change, > so we probably should consider adding configuration options to control them.. > > Thanks, > Dmitry
