Results 7 issues of Reid Chan

Seems there's no way to add this metrics for NettyRpcServer

``` com.intel.pmem.llpl.HeapException: Failed to allocate memory of size 2097152 at com.intel.pmem.llpl.MemoryAccessor.lambda$new$0(MemoryAccessor.java:65) at com.intel.pmem.llpl.MemoryAccessor.(MemoryAccessor.java:77) at com.intel.pmem.llpl.AnyMemoryBlock.(AnyMemoryBlock.java:34) at com.intel.pmem.llpl.AbstractMemoryBlock.(AbstractMemoryBlock.java:16) at com.intel.pmem.llpl.MemoryBlock.(MemoryBlock.java:25) at com.intel.pmem.llpl.Heap.allocateMemoryBlock(Heap.java:226) at org.apache.hadoop.hbase.regionserver.PersistentMemstoreLAB.allocateBytes(PersistentMemstoreLAB.java:102) at org.apache.hadoop.hbase.regionserver.TestPersistentMemstoreLAB.testLABLargeAllocation(TestPersistentMemstoreLAB.java:74) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)...

Descriptions of the changes in this PR: ### Motivation Fix a bug described in issue: #4094 ### Changes When executing `format` method, as `layoutManager` is inited already as user configured,...

### Motivation With this feature, the compiler will detect and generate an error when using APIs that don't exist in previous releases of Java SE in advance. ### Changes Add...

area/build
type/improvement

**BUG REPORT** ***Describe the bug*** I configured the serviceURL with *zk+longhierarchical* which means using LongHierarchicalLedgerManager. But after executing shell metaformat, in the LAYOUT znode is HierarchicalLedgerManager in fact. ***To Reproduce***...

type/bug

**FEATURE REQUEST** Starting JDK 9, the javac executable can accept the --release option to specify against which Java SE release you want to build the project. 1. The --release option...

type/feature