daimin created HDFS-16272:
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Summary: Int overflow in computing safe length during EC block
recovery
Key: HDFS-16272
URL: https://issues.apache.org/jira/browse/HDFS-16272
Project: Hadoop HDFS
Issue Type: Bug
Components: 3.1.1
Affects Versions: 3.3.1, 3.3.0
Environment: Cluster settings: EC RS-8-2-256k, Block Size 1GiB.
Reporter: daimin
There exists an int overflow problem in StripedBlockUtil#getSafeLength, which
will produce a negative or zero length:
1. With negative length, it fails to the later >=0 check, and will crash the
BlockRecoveryWorker thread, which make the lease recovery operation unable to
finish.
2. With zero length, it passes the check, and directly truncate the block size
to zero, leads to data lossing.
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