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HADOOP-17332. S3A MarkerTool -min and -max are inverted. (#2425) 

This patch
* fixes the inversion
* adds a precondition check
* if the commands are supplied inverted, swaps them with a warning.
  This is to stop breaking any tests written to cope with the existing
  behavior.

Contributed by Steve Loughran
This commit is contained in:
Steve Loughran 2020-11-23 20:49:42 +00:00 committed by GitHub
parent 07b7d07388
commit 9b4faf2b51
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2 changed files with 39 additions and 4 deletions
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22
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/tools/MarkerTool.java
View File

@ -57,6 +57,7 @@ import org.apache.hadoop.fs.s3a.impl.DirectoryPolicyImpl;
import org.apache.hadoop.fs.s3a.impl.StoreContext;
import org.apache.hadoop.fs.s3a.s3guard.S3GuardTool;
import org.apache.hadoop.fs.shell.CommandFormat;
import org.apache.hadoop.thirdparty.com.google.common.base.Preconditions;
import org.apache.hadoop.util.DurationInfo;
import org.apache.hadoop.util.ExitUtil;
@ -395,10 +396,22 @@ public final class MarkerTool extends S3GuardTool {
} else {
filterPolicy = null;
}
int minMarkerCount = scanArgs.getMinMarkerCount();
int maxMarkerCount = scanArgs.getMaxMarkerCount();
if (minMarkerCount > maxMarkerCount) {
// swap min and max if they are wrong.
// this is to ensure any test scripts written to work around
// HADOOP-17332 and min/max swapping continue to work.
println(out, "Swapping -min (%d) and -max (%d) values",
minMarkerCount, maxMarkerCount);
int m = minMarkerCount;
minMarkerCount = maxMarkerCount;
maxMarkerCount = m;
}
ScanResult result = scan(target,
scanArgs.isDoPurge(),
scanArgs.getMaxMarkerCount(),
scanArgs.getMinMarkerCount(),
minMarkerCount,
maxMarkerCount,
scanArgs.getLimit(),
filterPolicy);
return result;
@ -513,6 +526,11 @@ public final class MarkerTool extends S3GuardTool {
final DirectoryPolicy filterPolicy)
throws IOException, ExitUtil.ExitException {
// safety check: min and max are correctly ordered at this point.
Preconditions.checkArgument(minMarkerCount <= maxMarkerCount,
"The min marker count of %d is greater than the max value of %d",
minMarkerCount, maxMarkerCount);
ScanResult result = new ScanResult();
// Mission Accomplished

21
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/tools/ITestMarkerTool.java
View File

@ -259,8 +259,25 @@ public class ITestMarkerTool extends AbstractMarkerToolTest {
AUDIT,
m(OPT_LIMIT), 0,
m(OPT_OUT), audit,
m(OPT_MIN), expectedMarkersWithBaseDir,
m(OPT_MAX), expectedMarkersWithBaseDir,
m(OPT_MIN), expectedMarkersWithBaseDir - 1,
m(OPT_MAX), expectedMarkersWithBaseDir + 1,
createdPaths.base);
expectMarkersInOutput(audit, expectedMarkersWithBaseDir);
}
@Test
public void testRunAuditWithExpectedMarkersSwappedMinMax() throws Throwable {
describe("Run a verbose audit with the min/max ranges swapped;"
+ " see HADOOP-17332");
// a run under the keeping FS will create paths
CreatedPaths createdPaths = createPaths(getKeepingFS(), methodPath());
final File audit = tempAuditFile();
run(MARKERS, V,
AUDIT,
m(OPT_LIMIT), 0,
m(OPT_OUT), audit,
m(OPT_MIN), expectedMarkersWithBaseDir + 1,
m(OPT_MAX), expectedMarkersWithBaseDir - 1,
createdPaths.base);
expectMarkersInOutput(audit, expectedMarkersWithBaseDir);
}