std::length_error

小数量已经跑通了，2个ps，7个worker，大概32G数据。
但是继续增加文件个数抛出异常： std::length_error
请问是什么原因，怎么解决？

Start by reproducing the std::length_error with more input files than the reported 32G, using the attached error screenshot and the 2-parameter-server, 7-worker setup as context. Trace where the exception is raised and identify the input-size condition; done means documenting the cause and confirming a reliable fix or workaround at larger scale.

Written by the indexing model from the issue text.