[Bug] Unit tests fail with NPE in HDFS-Tests (loader)

[kenssa4eedfd]

Bug Type (问题类型)

None

Before submit

• I had searched in the issues and found no similar issues.

Environment (环境信息)

• Toolchain Version: v1.7.0

Expected & Actual behavior (期望与实际表现)

refer: #704, when changing the default loader optional --parser-threads > 1

Running UT triggers a NullPointerException (NPE) in testMultiFilesHaveHeader and testFilterPathBySuffix within HDFSLoaderTest. (Currently set it to 1)

Vertex/Edge example (问题点 / 边数据举例)

Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)

[dosubot]

Hi @kenssa4eedfd! I'm Dosu and I’m helping the incubator-hugegraph-toolchain team.

PR #704 updates loader parameter logic and batch insertion failure handling, including changes to concurrency control and the --parser-threads parameter. It adds validation for minimum values, adjusts default values based on CPU environment, and refactors error handling logic. While it doesn't directly mention fixing the NPE in HDFSLoaderTest, these changes are closely related to loader concurrency and parameter handling, which could impact or help diagnose the issue when --parser-threads > 1. Reviewing the changes in #704 may provide insight or a potential workaround for your bug. No other issues or threads directly address this NPE at this time.
See PR #704 for details.

To reply, just mention @dosu.

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