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https://issues.apache.org/jira/browse/HBASE-25206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17218830#comment-17218830
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Anoop Sam John commented on HBASE-25206:
----------------------------------------
the data loss (file deleted instead of archived) will happen if we took
snapshot and keep that only but deleted the original table right? Did not clone
new table from snapshot initially but later at some point user may want to do
so. Just confirming.
> Data loss can happen if a cloned table loses original split region(delete
> table)
> --------------------------------------------------------------------------------
>
> Key: HBASE-25206
> URL: https://issues.apache.org/jira/browse/HBASE-25206
> Project: HBase
> Issue Type: Bug
> Reporter: Toshihiro Suzuki
> Assignee: Toshihiro Suzuki
> Priority: Major
>
> Steps to reproduce are as follows:
> 1. Create a table and put some data into the table:
> {code:java}
> create 'test1','cf'
> put 'test1','r1','cf','v1'
> put 'test1','r2','cf','v2'
> put 'test1','r3','cf','v3'
> put 'test1','r4','cf','v4'
> put 'test1','r5','cf','v5'
> {code}
> 2. Take a snapshot for the table:
> {code:java}
> snapshot 'test1','snap_test'
> {code}
> 3. Clone the snapshot to another table
> {code:java}
> clone_snapshot 'snap_test','test2'
> {code}
> 4. Delete the snapshot
> {code:java}
> delete_snapshot 'snap_test'
> {code}
> 5. Split the original table
> {code:java}
> split 'test1','r3'
> {code}
> 6. Drop the original table
> {code:java}
> disable 'test1'
> drop 'test1'
> {code}
> After that, we see the error like the following in RS log when opening the
> regions of the cloned table:
> {code:java}
> 2020-10-20 13:32:18,415 WARN org.apache.hadoop.hbase.regionserver.HRegion:
> Failed initialize of region=
> test2,,1603200595702.bebdc4f740626206eeccad96b7643261., starting to roll back
> memstore
> java.io.IOException: java.io.IOException: java.io.FileNotFoundException:
> Unable to open link: org.apache.hadoop.hbase.io.HFileLink
> locations=[hdfs://<NN
> HOST>:8020/hbase/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/.tmp/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/mobdir/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/archive/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89]
> at
> org.apache.hadoop.hbase.regionserver.HRegion.initializeStores(HRegion.java:1095)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:943)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:899)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:7246)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:7204)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:7176)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:7134)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:7085)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:283)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:108)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:104)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.io.IOException: java.io.FileNotFoundException: Unable to open
> link: org.apache.hadoop.hbase.io.HFileLink locations=[hdfs://<NN
> HOST>:8020/hbase/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/.tmp/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/mobdir/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/archive/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89]
> at
> org.apache.hadoop.hbase.regionserver.HStore.openStoreFiles(HStore.java:590)
> at
> org.apache.hadoop.hbase.regionserver.HStore.loadStoreFiles(HStore.java:557)
> at org.apache.hadoop.hbase.regionserver.HStore.<init>(HStore.java:303)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateHStore(HRegion.java:5731)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:1059)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:1056)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> ... 3 more
> Caused by: java.io.FileNotFoundException: Unable to open link:
> org.apache.hadoop.hbase.io.HFileLink locations=[hdfs://<NN
> HOST>:8020/hbase/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/.tmp/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/mobdir/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89,
> hdfs://<NN
> HOST>:8020/hbase/archive/data/default/test1/349b766b1b38e21f627ed4e441ae643c/cf/b6e39865710345c8998dec0bcc94cc89]
> at
> org.apache.hadoop.hbase.io.FileLink$FileLinkInputStream.tryOpen(FileLink.java:322)
> at
> org.apache.hadoop.hbase.io.FileLink$FileLinkInputStream.<init>(FileLink.java:126)
> at
> org.apache.hadoop.hbase.io.FileLink$FileLinkInputStream.<init>(FileLink.java:117)
> at org.apache.hadoop.hbase.io.FileLink.open(FileLink.java:429)
> at
> org.apache.hadoop.hbase.io.FSDataInputStreamWrapper.<init>(FSDataInputStreamWrapper.java:125)
> at
> org.apache.hadoop.hbase.io.FSDataInputStreamWrapper.<init>(FSDataInputStreamWrapper.java:107)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileInfo.open(StoreFileInfo.java:261)
> at
> org.apache.hadoop.hbase.regionserver.HStoreFile.open(HStoreFile.java:368)
> at
> org.apache.hadoop.hbase.regionserver.HStoreFile.initReader(HStoreFile.java:476)
> at
> org.apache.hadoop.hbase.regionserver.HStore.createStoreFileAndReader(HStore.java:703)
> at
> org.apache.hadoop.hbase.regionserver.HStore.lambda$openStoreFiles$1(HStore.java:573)
> ... 6 more
> {code}
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