dfs datanode metrics, bytes_read, bytes_written overflows due to incorrect type
used.
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Key: HADOOP-4228
URL: https://issues.apache.org/jira/browse/HADOOP-4228
Project: Hadoop Core
Issue Type: Bug
Components: metrics
Affects Versions: 0.18.1
Environment: Red Hat Enterprise Linux AS release 4 (Nahant Update 5),
Java 1.6.
Reporter: Eric Yang
bytes_read, and bytes_written metrics are using int (MetricsTimeVaryingInt) as
counter. This type is too small to store the bytes_read and bytes_written
metrics. Recommend to change this to long (metricsLongValue).
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