Why? I started ues Deep storage is Cassandra ，when i change Deep storage For local disk , compact error

[beepupa]

my conf

error

[beepupa]

[abhishekagarwal87]

The segments, that were created with Cassandra as deep storage, still refer to Cassandra locations in their load spec. When compaction runs on these old segments, druid tries to read their load spec and fails since Cassandra paths can't be deserialized without the extension.

[FrankChen021]

As @abhishekagarwal87 stated, Cassandra extension must be kept in the druid.extensions.loadList in your conf so that old segments could be loaded from Cassandra.

[beepupa]

使用Cassandra创建的分段作为深度存储，在其负载规格中仍引用Cassandra的位置。当压缩在这些旧段上运行时，由于无法扩展Cassandra路径，因此德鲁伊尝试读取其负载规格并失败。
Thank you for your advice. I'll try

[beepupa]

如@ abhishekagarwal87所述，必须将cassandra扩展名保留在druid.extensions.loadListconf中，以便可以从Cassandra加载旧段。

Thank you for your advice

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