Zhihong Ted Yu created HBASE-6277:
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Summary: Metrics for scan object are overwritten when restart() is
called
Key: HBASE-6277
URL: https://issues.apache.org/jira/browse/HBASE-6277
Project: HBase
Issue Type: Bug
Reporter: Zhihong Ted Yu
>From HBASE-4145:
There's an issue in {{TableRecordReaderImpl}}. Calling restart() does this:
{code}
public void restart(byte[] firstRow) throws IOException {
currentScan = new Scan(scan);
{code}
Which by itself is fine since the metrics will be copied from *scan* to
*currentScan*, except that it's *currentScan* that has the updated metrics not
*scan*.
In other words, *currentScan* is the object that is used for scanning so it
contains the metrics. If restart() is called, that object is overwritten by the
original definition of the {{Scan}}. I think to fix this we could grab the
metrics from *currentScan* first then set them back on the new object.
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