Issue

The dsbulk unload command fails with the following error:

Caused by: com.datastax.oss.driver.api.core.connection.FrameTooLongException: Adjusted frame length exceeds 256000000: 258466636 - discarded

Cause: 

This error occurs because the frame length has exceeded the limit set by protocol.max-frame-length in the Java code.

Relevant code can be found here:

• FrameTooLongException Documentation

Resolution

Overview

Try reducing the number of pages. The default for "--datastax-java-driver.basic.request.page-size" is 5000. You can set a lower value, such as --datastax-java-driver.basic.request.page-size 1000. 

For more details on this parameter, visit:

https://github.com/yugabyte/dsbulk/blob/yb-dsbulk-1.6/manual/settings.md?plain=1#L1486

Additional Information

If you are using the Cassandra Driver, this can also be configured on the server side using native_transport_max_frame_size_in_mb Ensure that this setting is consistent in both DSBulk and Cassandra.

Reference: GitHub Issue #389

NOTE: The --driver.advanced.protocol.max-frame-length 'xxx MiB' option for dsbulk works on the command line but not in dsbulk.conf.

Other Reference:

• Driver Options Documentation