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https://issues.apache.org/jira/browse/HBASE-29825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18051973#comment-18051973
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Vladimir Rodionov commented on HBASE-29825:
-------------------------------------------
[~kgeiszler], could you please update affected versions?
> Incremental backup is failing due to incorrect timezone
> -------------------------------------------------------
>
> Key: HBASE-29825
> URL: https://issues.apache.org/jira/browse/HBASE-29825
> Project: HBase
> Issue Type: Bug
> Components: backup&restore
> Reporter: Kevin Geiszler
> Priority: Major
>
> Running an incremental backup at a certain time of the day will result in an
> exception (see below). I noticed this error when running
> {{IntegrationTestContinuousBackupRestore}} on my machine using IntelliJ. The
> interesting part is I did not see this issue during the day until at or after
> 4 PM Pacific Time, which also happens to be 00:00:00 UTC. The UTC timezone
> is not being set for the {{dateFormat}} variable in
> [BackupUtils.getValidWalDirs()|https://github.com/apache/hbase/blob/HBASE-28957/hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/util/BackupUtils.java#L998].
> We need to set the timezone after creating {{{}dateFormat{}}}:
> {code:java}
> SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT);
> dateFormat.setTimeZone(TimeZone.getTimeZone("UTC")); {code}
> The exception:
> {code:java}
> 2026-01-08T21:26:21,300 ERROR [Thread-223 {}] impl.TableBackupClient(232):
> Unexpected exception in incremental-backup: incremental copy
> backup_1767936354830Can not convert from directory (check Hadoop, HBase and
> WALPlayer M/R job logs)
> java.io.IOException: Can not convert from directory (check Hadoop, HBase and
> WALPlayer M/R job logs)
> at
> org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.walToHFiles(IncrementalTableBackupClient.java:525)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.convertWALsToHFiles(IncrementalTableBackupClient.java:461)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.execute(IncrementalTableBackupClient.java:344)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.backup.impl.BackupAdminImpl.backupTables(BackupAdminImpl.java:681)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.backup.IntegrationTestBackupRestoreBase.backup(IntegrationTestBackupRestoreBase.java:384)
> ~[test-classes/:?]
> at
> org.apache.hadoop.hbase.backup.IntegrationTestBackupRestoreBase.runTestSingle(IntegrationTestBackupRestoreBase.java:299)
> ~[test-classes/:?]
> at
> org.apache.hadoop.hbase.backup.IntegrationTestBackupRestoreBase$BackupAndRestoreThread.run(IntegrationTestBackupRestoreBase.java:136)
> ~[test-classes/:?]
> at java.lang.Thread.run(Thread.java:840) ~[?:?]
> Caused by: java.lang.IllegalArgumentException: Can not create a Path from an
> empty string
> at org.apache.hadoop.fs.Path.checkPathArg(Path.java:173)
> ~[hadoop-common-3.4.1.jar:?]
> at org.apache.hadoop.fs.Path.<init>(Path.java:185)
> ~[hadoop-common-3.4.1.jar:?]
> at org.apache.hadoop.util.StringUtils.stringToPath(StringUtils.java:279)
> ~[hadoop-common-3.4.1.jar:?]
> at
> org.apache.hadoop.hbase.mapreduce.WALInputFormat.getInputPaths(WALInputFormat.java:348)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.mapreduce.WALInputFormat.getSplits(WALInputFormat.java:311)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.mapreduce.WALInputFormat.getSplits(WALInputFormat.java:301)
> ~[classes/:?]
> at
> org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:311)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at
> org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:328)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at
> org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:201)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1677)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1674)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at java.security.AccessController.doPrivileged(AccessController.java:712)
> ~[?:?]
> at javax.security.auth.Subject.doAs(Subject.java:439) ~[?:?]
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1953)
> ~[hadoop-common-3.4.1.jar:?]
> at org.apache.hadoop.mapreduce.Job.submit(Job.java:1674)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1695)
> ~[hadoop-mapreduce-client-core-3.4.1.jar:?]
> at org.apache.hadoop.hbase.mapreduce.WALPlayer.run(WALPlayer.java:445)
> ~[classes/:?]
> at
> org.apache.hadoop.hbase.backup.impl.IncrementalTableBackupClient.walToHFiles(IncrementalTableBackupClient.java:516)
> ~[classes/:?]
> ... 7 more {code}
>
>
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