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https://issues.apache.org/jira/browse/HBASE-26021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17375827#comment-17375827
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Bharath Vissapragada commented on HBASE-26021:
----------------------------------------------
Created subtasks for the documentation and serialization fixups. I think it is
unlikely that anyone upgraded to 1.7.0 (with existing tables) because they'd
run into this problem. However agree that there could be users who installed
1.7.0 from scratch or upgraded an empty cluster to 1.7.0 and then created
tables with the faulty serialization. Let me see if there is an easy way to fix
them up at runtime (with some caveats).
> HBase 1.7 to 2.4 upgrade issue due to incompatible deserialization
> ------------------------------------------------------------------
>
> Key: HBASE-26021
> URL: https://issues.apache.org/jira/browse/HBASE-26021
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 1.7.0, 2.4.4
> Reporter: Viraj Jasani
> Assignee: Bharath Vissapragada
> Priority: Major
> Labels: compatibility, incompatibility, serialization, upgrade
> Fix For: 1.7.1
>
> Attachments: Screenshot 2021-06-22 at 12.54.21 PM.png, Screenshot
> 2021-06-22 at 12.54.30 PM.png
>
>
> As of today, if we bring up HBase cluster using branch-1 and upgrade to
> branch-2.4, we are facing issue while parsing namespace from HDFS fileinfo.
> Instead of "*hbase:meta*" and "*hbase:namespace*", parsing using ProtobufUtil
> seems to be producing "*\n hbase meta*" and "*\n hbase namespace*"
> {code:java}
> 2021-06-22 00:05:56,611 INFO
> [RpcServer.priority.RWQ.Fifo.read.handler=3,queue=1,port=16025]
> regionserver.RSRpcServices: Open hbase:meta,,1.1588230740
> 2021-06-22 00:05:56,648 INFO
> [RpcServer.priority.RWQ.Fifo.read.handler=5,queue=1,port=16025]
> regionserver.RSRpcServices: Open
> hbase:namespace,,1624297762817.396cb6cc00cd4334cb1ea3a792d7529a.
> 2021-06-22 00:05:56,759 ERROR
> [RpcServer.priority.RWQ.Fifo.read.handler=5,queue=1,port=16025]
> ipc.RpcServer: Unexpected throwable object
> java.lang.IllegalArgumentException: Illegal character <
> > at 0. Namespaces may only contain 'alphanumeric characters' from any
> > language and digits:
> ^Ehbase^R namespace
> at
> org.apache.hadoop.hbase.TableName.isLegalNamespaceName(TableName.java:246)
> at
> org.apache.hadoop.hbase.TableName.isLegalNamespaceName(TableName.java:220)
> at org.apache.hadoop.hbase.TableName.<init>(TableName.java:348)
> at
> org.apache.hadoop.hbase.TableName.createTableNameIfNecessary(TableName.java:385)
> at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:508)
> at
> org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toTableName(ProtobufUtil.java:2292)
> at
> org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toTableDescriptor(ProtobufUtil.java:2937)
> at
> org.apache.hadoop.hbase.client.TableDescriptorBuilder$ModifyableTableDescriptor.parseFrom(TableDescriptorBuilder.java:1625)
> at
> org.apache.hadoop.hbase.client.TableDescriptorBuilder$ModifyableTableDescriptor.access$200(TableDescriptorBuilder.java:597)
> at
> org.apache.hadoop.hbase.client.TableDescriptorBuilder.parseFrom(TableDescriptorBuilder.java:320)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.readTableDescriptor(FSTableDescriptors.java:511)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.getTableDescriptorFromFs(FSTableDescriptors.java:496)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.getTableDescriptorFromFs(FSTableDescriptors.java:482)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.get(FSTableDescriptors.java:210)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.openRegion(RSRpcServices.java:2112)
> at
> org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos$AdminService$2.callBlockingMethod(AdminProtos.java:35218)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:395)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318)
> 2021-06-22 00:05:56,759 ERROR
> [RpcServer.priority.RWQ.Fifo.read.handler=3,queue=1,port=16025]
> ipc.RpcServer: Unexpected throwable object
> java.lang.IllegalArgumentException: Illegal character <
> > at 0. Namespaces may only contain 'alphanumeric characters' from any
> > language and digits:
> ^Ehbase^R^Dmeta
> at
> org.apache.hadoop.hbase.TableName.isLegalNamespaceName(TableName.java:246)
> at
> org.apache.hadoop.hbase.TableName.isLegalNamespaceName(TableName.java:220)
> at org.apache.hadoop.hbase.TableName.<init>(TableName.java:348)
> at
> org.apache.hadoop.hbase.TableName.createTableNameIfNecessary(TableName.java:385)
> at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:508)
> at
> org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toTableName(ProtobufUtil.java:2292)
> at
> org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toTableDescriptor(ProtobufUtil.java:2937)
> at
> org.apache.hadoop.hbase.client.TableDescriptorBuilder$ModifyableTableDescriptor.parseFrom(TableDescriptorBuilder.java:1625)
> at
> org.apache.hadoop.hbase.client.TableDescriptorBuilder$ModifyableTableDescriptor.access$200(TableDescriptorBuilder.java:597)
> at
> org.apache.hadoop.hbase.client.TableDescriptorBuilder.parseFrom(TableDescriptorBuilder.java:320)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.readTableDescriptor(FSTableDescriptors.java:511)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.getTableDescriptorFromFs(FSTableDescriptors.java:496)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.getTableDescriptorFromFs(FSTableDescriptors.java:482)
> at
> org.apache.hadoop.hbase.util.FSTableDescriptors.get(FSTableDescriptors.java:210)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.openRegion(RSRpcServices.java:2112)
> at
> org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos$AdminService$2.callBlockingMethod(AdminProtos.java:35218)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:395)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318){code}
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