Dieter De Paepe created HBASE-28461:
---------------------------------------
Summary: Timing issue in Incremental Backup or
TestIncrementalBackup
Key: HBASE-28461
URL: https://issues.apache.org/jira/browse/HBASE-28461
Project: HBase
Issue Type: Bug
Components: backup&restore
Affects Versions: 2.6.0, 4.0.0-alpha-1
Environment: HBase master - commit
298c550c804305f2c57029a563039eefcbb4af40
20.04.1-Ubuntu
Reporter: Dieter De Paepe
While working on tests for HBASE-28412, I noticed that `TestIncrementalBackup`
always fails on my computer and the computer of a colleague. However, I manage
to get this test working 100% when setting breakpoints on following locations
(accidentally discovered while trying to debug this issue):
* `IncrementalTableBackupClient` L269 (`newTimestamps =
((IncrementalBackupManager) backupManager).getIncrBackupLogFileMap();`)
* `IncrementalBackupManager` L96 (`logList =
getLogFilesForNewBackup(previousTimestampMins, newTimestamps, conf,
savedStartCode);`)
* `WALInputFormat` L356 (`logList =
getLogFilesForNewBackup(previousTimestampMins, newTimestamps, conf,
savedStartCode);`)
This test fails with the following error:
{code:java}
java.io.IOException: java.io.FileNotFoundException: File
hdfs://localhost:46787/user/dieter/test-data/b615664f-1cde-fc27-1752-33ab359a931c/WALs/localhost,38309,1711553427191/localhost%2C38309%2C1711553427191.localhost%2C38309%2C1711553427191.regiongroup-0.1711553471361
does not exist. at
org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.execute(IncrementalTableBackupClient.java:289)
at
org.apache.hadoop.hbase.backup.impl.BackupAdminImpl.backupTables(BackupAdminImpl.java:603)
at
org.apache.hadoop.hbase.backup.TestIncrementalBackup.TestIncBackupRestore(TestIncrementalBackup.java:169)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.io.FileNotFoundException: File
hdfs://localhost:46787/user/dieter/test-data/b615664f-1cde-fc27-1752-33ab359a931c/WALs/localhost,38309,1711553427191/localhost%2C38309%2C1711553427191.localhost%2C38309%2C1711553427191.regiongroup-0.1711553471361
does not exist.
at
org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.<init>(DistributedFileSystem.java:1282)
at
org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.<init>(DistributedFileSystem.java:1256)
at
org.apache.hadoop.hdfs.DistributedFileSystem$25.doCall(DistributedFileSystem.java:1201)
at
org.apache.hadoop.hdfs.DistributedFileSystem$25.doCall(DistributedFileSystem.java:1197)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.listLocatedStatus(DistributedFileSystem.java:1215)
at org.apache.hadoop.fs.FileSystem.listLocatedStatus(FileSystem.java:2230)
at
org.apache.hadoop.hbase.mapreduce.WALInputFormat.getFiles(WALInputFormat.java:356)
at
org.apache.hadoop.hbase.mapreduce.WALInputFormat.getSplits(WALInputFormat.java:321)
at
org.apache.hadoop.hbase.mapreduce.WALInputFormat.getSplits(WALInputFormat.java:301)
at
org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:310)
at
org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:327)
at
org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:200)
at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1678)
at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1675)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/javax.security.auth.Subject.doAs(Subject.java:423)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1899)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1675)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1696)
at org.apache.hadoop.hbase.mapreduce.WALPlayer.run(WALPlayer.java:423)
at
org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.walToHFiles(IncrementalTableBackupClient.java:406)
at
org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.convertWALsToHFiles(IncrementalTableBackupClient.java:378)
at
org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.execute(IncrementalTableBackupClient.java:282)
... 34 more {code}
I suspect the issue is that the WAL files are not yet fully written to HDFS
when the WALPlayer tries to convert them to HFiles.
Since I'm not sure about the exact cause yet, I'm also not sure if this is a
problem with the test (which uses a dedicated
`IncrementalTableBackupClientForTest`) or the actual backup code.
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