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hadoop-common-project/hadoop-common/src/site/markdown/release/0.18.2/RELEASENOTES.0.18.2.md

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Apache Hadoop 0.18.2 Release Notes

These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.

  • HADOOP-4277 | Blocker | Checksum verification is disabled for LocalFS

Checksum verification was mistakenly disabled for LocalFileSystem.

  • HADOOP-4271 | Blocker | Bug in FSInputChecker makes it possible to read from an invalid buffer

Checksum input stream can sometimes return invalid data to the user.

  • HADOOP-4314 | Blocker | TestReplication fails quite often

Simulated Datanodes should not include blocks that are still being written in their block report.

  • HADOOP-4228 | Blocker | dfs datanode metrics, bytes_read, bytes_written overflows due to incorrect type used.

Changed bytes_read, bytes_written to type long to prevent metrics overflow.

  • HADOOP-4467 | Blocker | SerializationFactory should use current context ClassLoader

SerializationFactory now uses the current context ClassLoader allowing for user supplied Serialization instances.