junegunn commented on code in PR #6799:
URL: https://github.com/apache/hbase/pull/6799#discussion_r2085838073


##########
hbase-server/src/main/java/org/apache/hadoop/hbase/util/TableDescriptorChecker.java:
##########
@@ -79,6 +80,14 @@ public static void sanityCheck(final Configuration c, final 
TableDescriptor td)
     // Setting logs to warning instead of throwing exception if sanityChecks 
are disabled
     boolean logWarn = !shouldSanityCheck(conf);
 
+    // Check value types
+    warnOrThrowExceptionForFailure(logWarn, () -> ConfigKey.validate(conf));
+    warnOrThrowExceptionForFailure(logWarn, () -> {
+      for (ColumnFamilyDescriptor cfd : td.getColumnFamilies()) {
+        ConfigKey.validate(new 
CompoundConfiguration().addBytesMap(cfd.getValues()));

Review Comment:
   @guluo2016 I just rebuilt HBase from the tip of `branch-2`. For an invalid 
table-level configuration, HBase rejected it as expected.
   
   ```
   hbase:002:0>  create 't03', 'info', { CONFIGURATION => { 
'hbase.hstore.defaultengine.compactionpolicy.class' =>
   'com.test.App' }}
   
   ERROR: org.apache.hadoop.hbase.DoNotRetryIOException: 
'hbase.hstore.defaultengine.compactionpolicy.class' must be a class. Set 
hbase.table.sanity.checks to false at conf or table descriptor if you want to 
bypass sanity checks
           at 
org.apache.hadoop.hbase.util.TableDescriptorChecker.warnOrThrowExceptionForFailure(TableDescriptorChecker.java:327)
           at 
org.apache.hadoop.hbase.util.TableDescriptorChecker.warnOrThrowExceptionForFailure(TableDescriptorChecker.java:344)
           at 
org.apache.hadoop.hbase.util.TableDescriptorChecker.sanityCheck(TableDescriptorChecker.java:84)
           at 
org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:2400)
           at 
org.apache.hadoop.hbase.master.MasterRpcServices.createTable(MasterRpcServices.java:712)
           at 
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java)
           at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:443)
           at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
           at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:105)
           at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:85)
   Caused by: java.lang.IllegalArgumentException: 
'hbase.hstore.defaultengine.compactionpolicy.class' must be a class.
           at 
org.apache.hadoop.hbase.conf.ConfigKey.lambda$CLASS$8(ConfigKey.java:109)
           at 
org.apache.hadoop.hbase.conf.ConfigKey.lambda$validate$9(ConfigKey.java:133)
           at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
           at 
org.apache.hadoop.hbase.conf.ConfigKey.validate(ConfigKey.java:130)
           at 
org.apache.hadoop.hbase.util.TableDescriptorChecker.lambda$sanityCheck$0(TableDescriptorChecker.java:84)
           at 
org.apache.hadoop.hbase.util.TableDescriptorChecker.warnOrThrowExceptionForFailure(TableDescriptorChecker.java:342)
           ... 8 more
   Caused by: java.lang.ClassNotFoundException: com.test.App
           at 
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
           at 
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
           at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
           at java.base/java.lang.Class.forName0(Native Method)
           at java.base/java.lang.Class.forName(Class.java:375)
           at 
org.apache.hadoop.hbase.conf.ConfigKey.lambda$CLASS$8(ConfigKey.java:104)
           ... 13 more
   
   For usage try 'help "create"'
   
   Took 0.0050 seconds
   ```
   
   However, as you mentioned, column-family level configuration is not verified 
unlike in master branch.
   
   ```
    create 't03', { NAME => 'info', CONFIGURATION => { 
'hbase.hstore.defaultengine.compactionpolicy.class' => 'com.test.App' } }
   ```
   
   Let me take a closer look at it.



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