[
https://issues.apache.org/jira/browse/HBASE-14099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15158314#comment-15158314
]
Appy commented on HBASE-14099:
------------------------------
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
{noformat}
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)
{noformat}
I think it's because of using changing from KeyValue to a different sub-class
of {{Cell}}l which doesn't implement {{SettableSequenceId}}
{noformat}
- this.startKey =
KeyValueUtil.createFirstDeleteFamilyOnRow(scan.getStartRow(),
+ this.startKey =
CellUtil.createFirstDeleteFamilyCellOnRow(scan.getStartRow(),
{noformat}
To replicate it, download the attached hfiles somewhere, copy the
TestWithSingleHRegion class to regionserver tests, change the ROOT_DIR
appropriately and run it.
> StoreFile.passesKeyRangeFilter need not create Cells from the Scan's start
> and stop Row
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-14099
> URL: https://issues.apache.org/jira/browse/HBASE-14099
> Project: HBase
> Issue Type: Improvement
> Components: Performance, Scanners
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0
>
> Attachments: HBASE-14099.patch, HBASE-14099_1.patch,
> HBASE-14099_2.patch, HBASE-14099_3.patch, HBASE-14099_4.patch, storefile.png
>
>
> During profiling saw that the code here in passesKeyRangeFilter in Storefile
> {code}
> KeyValue smallestScanKeyValue = scan.isReversed() ? KeyValueUtil
> .createFirstOnRow(scan.getStopRow()) :
> KeyValueUtil.createFirstOnRow(scan
> .getStartRow());
> KeyValue largestScanKeyValue = scan.isReversed() ? KeyValueUtil
> .createLastOnRow(scan.getStartRow()) :
> KeyValueUtil.createLastOnRow(scan
> .getStopRow());
> {code}
> This row need not be copied now considering that we have
> CellComparator.compareRows(Cell, byte[]).
> We have already refactored the firstKeyKv and lastKeyKV as part of other
> JIRAs.
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