palashc commented on code in PR #1575:
URL: https://github.com/apache/phoenix/pull/1575#discussion_r1176897475
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phoenix-core/src/main/java/org/apache/phoenix/coprocessor/ReadRepairScanner.java:
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@@ -0,0 +1,196 @@
+package org.apache.phoenix.coprocessor;
+
+import org.apache.hadoop.hbase.Cell;
+import org.apache.hadoop.hbase.CellUtil;
+import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
+import org.apache.hadoop.hbase.filter.Filter;
+import org.apache.hadoop.hbase.filter.FilterList;
+import org.apache.hadoop.hbase.filter.PageFilter;
+import org.apache.hadoop.hbase.regionserver.Region;
+import org.apache.hadoop.hbase.regionserver.RegionScanner;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.phoenix.filter.PagedFilter;
+import org.apache.phoenix.util.EnvironmentEdgeManager;
+import org.apache.phoenix.util.ServerUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.List;
+
+import static
org.apache.phoenix.coprocessor.BaseScannerRegionObserver.EMPTY_COLUMN_FAMILY_NAME;
+import static
org.apache.phoenix.coprocessor.BaseScannerRegionObserver.EMPTY_COLUMN_QUALIFIER_NAME;
+import static org.apache.phoenix.util.ScanUtil.getDummyResult;
+import static org.apache.phoenix.util.ScanUtil.getPageSizeMsForRegionScanner;
+import static org.apache.phoenix.util.ScanUtil.isDummy;
+
+public abstract class ReadRepairScanner extends BaseRegionScanner {
+
+ public Logger LOGGER;
+ public RegionScanner scanner;
+ public Scan scan;
+ public RegionCoprocessorEnvironment env;
+ public byte[] emptyCF;
+ public byte[] emptyCQ;
+ public Region region;
+ public boolean hasMore;
+ public long pageSizeMs;
+ public long pageSize = Long.MAX_VALUE;
+ public long rowCount = 0;
+ public long maxTimestamp;
+ public long ageThreshold;
+ public boolean restartScanDueToPageFilterRemoval = false;
+
+ /*
+ Scanner used for checking ground truth to help with read repair.
+ */
+ private Scan externalScanner = null;
+ public Scan getExternalScanner() { return externalScanner; }
Review Comment:
This gets set
[here](https://github.com/apache/phoenix/pull/1575/files#diff-c392040c2e8440e5df98d189022fa6504a58b39107507e4ceafbd0b5fa035650R138),
the first time a row needs a repair.
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