[HBASE-15379] Fake cells created in read path not implementing SettableSequenceId

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Amal Joshy
• Reporter: Anoop Sam John
• Created: 02/Mar/16 05:32
• Updated: 17/Jun/22 05:16
• Resolved: 13/Mar/16 16:35

Description

This issue found by appy. In HBASE-14099 he says,
I was doing some testing when I hit a weird issue, seems related to this, so re-opening it (apologies in advance if it's not). Here's the stack trace

java.io.IOException: java.lang.UnsupportedOperationException: Cell is not of type org.apache.hadoop.hbase.SettableSequenceId

	at org.apache.hadoop.hbase.CellUtil.setSequenceId(CellUtil.java:923)
	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.setCurrentCell(StoreFileScanner.java:231)
	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.requestSeek(StoreFileScanner.java:389)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.seekScanners(StoreScanner.java:348)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:212)
	at org.apache.hadoop.hbase.regionserver.HStore.createScanner(HStore.java:1873)
	at org.apache.hadoop.hbase.regionserver.HStore.getScanner(HStore.java:1863)
	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:5487)
	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:2577)
	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2563)
	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2544)
	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2534)
	at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:6659)
	at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:6624)
	at org.apache.hadoop.hbase.regionserver.TestWithSingleHRegion.test(TestWithSingleHRegion.java:48)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)

I think it's because of using changing from KeyValue to a different sub-class of Cell}}l which doesn't implement {{SettableSequenceId

-    this.startKey = KeyValueUtil.createFirstDeleteFamilyOnRow(scan.getStartRow(),
+    this.startKey = CellUtil.createFirstDeleteFamilyCellOnRow(scan.getStartRow(),

To replicate it, download the attached hfiles somewhere, copy the TestWithSingleHRegion class to regionserver tests, change the ROOT_DIR appropriately and run it.

Issue Links

• is related to: HBASE-11425 Cell/DBB end-to-end on the read-path