HBASE-5707 Move clusterid and clusterup (shutdown) znodes over to pb

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1310568 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java

@@ -52,6 +52,7 @@ import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.util.SoftValueSortedMap;
 import org.apache.hadoop.hbase.util.Writables;
+import org.apache.hadoop.hbase.zookeeper.ClusterId;
 import org.apache.hadoop.hbase.zookeeper.MasterAddressTracker;
 import org.apache.hadoop.hbase.zookeeper.RootRegionTracker;
 import org.apache.hadoop.hbase.zookeeper.ZKTable;
@@ -608,8 +609,7 @@ public class HConnectionManager {
           ZooKeeperKeepAliveConnection zkw = null;
           try {
             zkw = getKeepAliveZooKeeperWatcher();
-            this.clusterId = Bytes.toString(
-              ZKUtil.getData(zkw, zkw.clusterIdZNode));
+            this.clusterId = ClusterId.readClusterIdZNode(zkw);
             if (clusterId == null) {
               LOG.info("ClusterId read in ZooKeeper is null");
             }

src/main/java/org/apache/hadoop/hbase/protobuf/generated/ZooKeeperProtos.java

@@ -954,6 +954,838 @@ public final class ZooKeeperProtos {
     // @@protoc_insertion_point(class_scope:Master)
   }
   
+  public interface ClusterIdOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+    
+    // required string clusterId = 1;
+    boolean hasClusterId();
+    String getClusterId();
+  }
+  public static final class ClusterId extends
+      com.google.protobuf.GeneratedMessage
+      implements ClusterIdOrBuilder {
+    // Use ClusterId.newBuilder() to construct.
+    private ClusterId(Builder builder) {
+      super(builder);
+    }
+    private ClusterId(boolean noInit) {}
+    
+    private static final ClusterId defaultInstance;
+    public static ClusterId getDefaultInstance() {
+      return defaultInstance;
+    }
+    
+    public ClusterId getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+    
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterId_descriptor;
+    }
+    
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterId_fieldAccessorTable;
+    }
+    
+    private int bitField0_;
+    // required string clusterId = 1;
+    public static final int CLUSTERID_FIELD_NUMBER = 1;
+    private java.lang.Object clusterId_;
+    public boolean hasClusterId() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    public String getClusterId() {
+      java.lang.Object ref = clusterId_;
+      if (ref instanceof String) {
+        return (String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = 
+            (com.google.protobuf.ByteString) ref;
+        String s = bs.toStringUtf8();
+        if (com.google.protobuf.Internal.isValidUtf8(bs)) {
+          clusterId_ = s;
+        }
+        return s;
+      }
+    }
+    private com.google.protobuf.ByteString getClusterIdBytes() {
+      java.lang.Object ref = clusterId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
+        clusterId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    
+    private void initFields() {
+      clusterId_ = "";
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+      
+      if (!hasClusterId()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
+      memoizedIsInitialized = 1;
+      return true;
+    }
+    
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeBytes(1, getClusterIdBytes());
+      }
+      getUnknownFields().writeTo(output);
+    }
+    
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+    
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(1, getClusterIdBytes());
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+    
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+    
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId)) {
+        return super.equals(obj);
+      }
+      org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId other = (org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId) obj;
+      
+      boolean result = true;
+      result = result && (hasClusterId() == other.hasClusterId());
+      if (hasClusterId()) {
+        result = result && getClusterId()
+            .equals(other.getClusterId());
+      }
+      result = result &&
+          getUnknownFields().equals(other.getUnknownFields());
+      return result;
+    }
+    
+    @java.lang.Override
+    public int hashCode() {
+      int hash = 41;
+      hash = (19 * hash) + getDescriptorForType().hashCode();
+      if (hasClusterId()) {
+        hash = (37 * hash) + CLUSTERID_FIELD_NUMBER;
+        hash = (53 * hash) + getClusterId().hashCode();
+      }
+      hash = (29 * hash) + getUnknownFields().hashCode();
+      return hash;
+    }
+    
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data, extensionRegistry)
+               .buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data, extensionRegistry)
+               .buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input, extensionRegistry)
+               .buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      Builder builder = newBuilder();
+      if (builder.mergeDelimitedFrom(input)) {
+        return builder.buildParsed();
+      } else {
+        return null;
+      }
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      Builder builder = newBuilder();
+      if (builder.mergeDelimitedFrom(input, extensionRegistry)) {
+        return builder.buildParsed();
+      } else {
+        return null;
+      }
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input, extensionRegistry)
+               .buildParsed();
+    }
+    
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+    
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterIdOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterId_descriptor;
+      }
+      
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterId_fieldAccessorTable;
+      }
+      
+      // Construct using org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+      
+      private Builder(BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+      
+      public Builder clear() {
+        super.clear();
+        clusterId_ = "";
+        bitField0_ = (bitField0_ & ~0x00000001);
+        return this;
+      }
+      
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+      
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId.getDescriptor();
+      }
+      
+      public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId getDefaultInstanceForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId.getDefaultInstance();
+      }
+      
+      public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId build() {
+        org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+      
+      private org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId buildParsed()
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(
+            result).asInvalidProtocolBufferException();
+        }
+        return result;
+      }
+      
+      public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId buildPartial() {
+        org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId result = new org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.clusterId_ = clusterId_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+      
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId) {
+          return mergeFrom((org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+      
+      public Builder mergeFrom(org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId other) {
+        if (other == org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId.getDefaultInstance()) return this;
+        if (other.hasClusterId()) {
+          setClusterId(other.getClusterId());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+      
+      public final boolean isInitialized() {
+        if (!hasClusterId()) {
+          
+          return false;
+        }
+        return true;
+      }
+      
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder(
+            this.getUnknownFields());
+        while (true) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              this.setUnknownFields(unknownFields.build());
+              onChanged();
+              return this;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                this.setUnknownFields(unknownFields.build());
+                onChanged();
+                return this;
+              }
+              break;
+            }
+            case 10: {
+              bitField0_ |= 0x00000001;
+              clusterId_ = input.readBytes();
+              break;
+            }
+          }
+        }
+      }
+      
+      private int bitField0_;
+      
+      // required string clusterId = 1;
+      private java.lang.Object clusterId_ = "";
+      public boolean hasClusterId() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      public String getClusterId() {
+        java.lang.Object ref = clusterId_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          clusterId_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setClusterId(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+        clusterId_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearClusterId() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        clusterId_ = getDefaultInstance().getClusterId();
+        onChanged();
+        return this;
+      }
+      void setClusterId(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000001;
+        clusterId_ = value;
+        onChanged();
+      }
+      
+      // @@protoc_insertion_point(builder_scope:ClusterId)
+    }
+    
+    static {
+      defaultInstance = new ClusterId(true);
+      defaultInstance.initFields();
+    }
+    
+    // @@protoc_insertion_point(class_scope:ClusterId)
+  }
+  
+  public interface ClusterUpOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+    
+    // required string startDate = 1;
+    boolean hasStartDate();
+    String getStartDate();
+  }
+  public static final class ClusterUp extends
+      com.google.protobuf.GeneratedMessage
+      implements ClusterUpOrBuilder {
+    // Use ClusterUp.newBuilder() to construct.
+    private ClusterUp(Builder builder) {
+      super(builder);
+    }
+    private ClusterUp(boolean noInit) {}
+    
+    private static final ClusterUp defaultInstance;
+    public static ClusterUp getDefaultInstance() {
+      return defaultInstance;
+    }
+    
+    public ClusterUp getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+    
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterUp_descriptor;
+    }
+    
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterUp_fieldAccessorTable;
+    }
+    
+    private int bitField0_;
+    // required string startDate = 1;
+    public static final int STARTDATE_FIELD_NUMBER = 1;
+    private java.lang.Object startDate_;
+    public boolean hasStartDate() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    public String getStartDate() {
+      java.lang.Object ref = startDate_;
+      if (ref instanceof String) {
+        return (String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = 
+            (com.google.protobuf.ByteString) ref;
+        String s = bs.toStringUtf8();
+        if (com.google.protobuf.Internal.isValidUtf8(bs)) {
+          startDate_ = s;
+        }
+        return s;
+      }
+    }
+    private com.google.protobuf.ByteString getStartDateBytes() {
+      java.lang.Object ref = startDate_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
+        startDate_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    
+    private void initFields() {
+      startDate_ = "";
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+      
+      if (!hasStartDate()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
+      memoizedIsInitialized = 1;
+      return true;
+    }
+    
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeBytes(1, getStartDateBytes());
+      }
+      getUnknownFields().writeTo(output);
+    }
+    
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+    
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(1, getStartDateBytes());
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+    
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+    
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp)) {
+        return super.equals(obj);
+      }
+      org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp other = (org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp) obj;
+      
+      boolean result = true;
+      result = result && (hasStartDate() == other.hasStartDate());
+      if (hasStartDate()) {
+        result = result && getStartDate()
+            .equals(other.getStartDate());
+      }
+      result = result &&
+          getUnknownFields().equals(other.getUnknownFields());
+      return result;
+    }
+    
+    @java.lang.Override
+    public int hashCode() {
+      int hash = 41;
+      hash = (19 * hash) + getDescriptorForType().hashCode();
+      if (hasStartDate()) {
+        hash = (37 * hash) + STARTDATE_FIELD_NUMBER;
+        hash = (53 * hash) + getStartDate().hashCode();
+      }
+      hash = (29 * hash) + getUnknownFields().hashCode();
+      return hash;
+    }
+    
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data, extensionRegistry)
+               .buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data, extensionRegistry)
+               .buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input, extensionRegistry)
+               .buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      Builder builder = newBuilder();
+      if (builder.mergeDelimitedFrom(input)) {
+        return builder.buildParsed();
+      } else {
+        return null;
+      }
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      Builder builder = newBuilder();
+      if (builder.mergeDelimitedFrom(input, extensionRegistry)) {
+        return builder.buildParsed();
+      } else {
+        return null;
+      }
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input).buildParsed();
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input, extensionRegistry)
+               .buildParsed();
+    }
+    
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+    
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUpOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterUp_descriptor;
+      }
+      
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.internal_static_ClusterUp_fieldAccessorTable;
+      }
+      
+      // Construct using org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+      
+      private Builder(BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+      
+      public Builder clear() {
+        super.clear();
+        startDate_ = "";
+        bitField0_ = (bitField0_ & ~0x00000001);
+        return this;
+      }
+      
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+      
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp.getDescriptor();
+      }
+      
+      public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp getDefaultInstanceForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp.getDefaultInstance();
+      }
+      
+      public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp build() {
+        org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+      
+      private org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp buildParsed()
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(
+            result).asInvalidProtocolBufferException();
+        }
+        return result;
+      }
+      
+      public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp buildPartial() {
+        org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp result = new org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.startDate_ = startDate_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+      
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp) {
+          return mergeFrom((org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+      
+      public Builder mergeFrom(org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp other) {
+        if (other == org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp.getDefaultInstance()) return this;
+        if (other.hasStartDate()) {
+          setStartDate(other.getStartDate());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+      
+      public final boolean isInitialized() {
+        if (!hasStartDate()) {
+          
+          return false;
+        }
+        return true;
+      }
+      
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder(
+            this.getUnknownFields());
+        while (true) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              this.setUnknownFields(unknownFields.build());
+              onChanged();
+              return this;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                this.setUnknownFields(unknownFields.build());
+                onChanged();
+                return this;
+              }
+              break;
+            }
+            case 10: {
+              bitField0_ |= 0x00000001;
+              startDate_ = input.readBytes();
+              break;
+            }
+          }
+        }
+      }
+      
+      private int bitField0_;
+      
+      // required string startDate = 1;
+      private java.lang.Object startDate_ = "";
+      public boolean hasStartDate() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      public String getStartDate() {
+        java.lang.Object ref = startDate_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          startDate_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setStartDate(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+        startDate_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearStartDate() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        startDate_ = getDefaultInstance().getStartDate();
+        onChanged();
+        return this;
+      }
+      void setStartDate(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000001;
+        startDate_ = value;
+        onChanged();
+      }
+      
+      // @@protoc_insertion_point(builder_scope:ClusterUp)
+    }
+    
+    static {
+      defaultInstance = new ClusterUp(true);
+      defaultInstance.initFields();
+    }
+    
+    // @@protoc_insertion_point(class_scope:ClusterUp)
+  }
+  
   private static com.google.protobuf.Descriptors.Descriptor
     internal_static_RootRegionServer_descriptor;
   private static
@@ -964,6 +1796,16 @@ public final class ZooKeeperProtos {
   private static
     com.google.protobuf.GeneratedMessage.FieldAccessorTable
       internal_static_Master_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_ClusterId_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_ClusterId_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_ClusterUp_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_ClusterUp_fieldAccessorTable;
   
   public static com.google.protobuf.Descriptors.FileDescriptor
       getDescriptor() {
@@ -975,9 +1817,11 @@ public final class ZooKeeperProtos {
     java.lang.String[] descriptorData = {
       "\n\017ZooKeeper.proto\032\013hbase.proto\"/\n\020RootRe" +
       "gionServer\022\033\n\006server\030\001 \002(\0132\013.ServerName\"" +
-      "%\n\006Master\022\033\n\006master\030\001 \002(\0132\013.ServerNameBE" +
-      "\n*org.apache.hadoop.hbase.protobuf.gener" +
-      "atedB\017ZooKeeperProtosH\001\210\001\001\240\001\001"
+      "%\n\006Master\022\033\n\006master\030\001 \002(\0132\013.ServerName\"\036" +
+      "\n\tClusterId\022\021\n\tclusterId\030\001 \002(\t\"\036\n\tCluste" +
+      "rUp\022\021\n\tstartDate\030\001 \002(\tBE\n*org.apache.had" +
+      "oop.hbase.protobuf.generatedB\017ZooKeeperP" +
+      "rotosH\001\210\001\001\240\001\001"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
       new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
@@ -1000,6 +1844,22 @@ public final class ZooKeeperProtos {
               new java.lang.String[] { "Master", },
               org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Master.class,
               org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.Master.Builder.class);
+          internal_static_ClusterId_descriptor =
+            getDescriptor().getMessageTypes().get(2);
+          internal_static_ClusterId_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_ClusterId_descriptor,
+              new java.lang.String[] { "ClusterId", },
+              org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId.class,
+              org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterId.Builder.class);
+          internal_static_ClusterUp_descriptor =
+            getDescriptor().getMessageTypes().get(3);
+          internal_static_ClusterUp_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_ClusterUp_descriptor,
+              new java.lang.String[] { "StartDate", },
+              org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp.class,
+              org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.ClusterUp.Builder.class);
           return null;
         }
       };

src/main/java/org/apache/hadoop/hbase/zookeeper/ClusterId.java

@@ -22,9 +22,12 @@ package org.apache.hadoop.hbase.zookeeper;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.Abortable;
-import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos;
 import org.apache.zookeeper.KeeperException;
 
+import com.google.protobuf.InvalidProtocolBufferException;
+
 /**
  * Publishes and synchronizes a unique identifier specific to a given HBase
  * cluster.  The stored identifier is read from the file system by the active
@@ -61,9 +64,9 @@ public class ClusterId {
   public static String readClusterIdZNode(ZooKeeperWatcher watcher)
       throws KeeperException {
     if (ZKUtil.checkExists(watcher, watcher.clusterIdZNode) != -1) {
-      byte[] data = ZKUtil.getData(watcher, watcher.clusterIdZNode);
+      byte [] data = ZKUtil.getData(watcher, watcher.clusterIdZNode);
       if (data != null) {
-        return Bytes.toString(data);
+        return getZNodeClusterId(data);
       }
     }
     return null;
@@ -71,6 +74,37 @@ public class ClusterId {
 
   public static void setClusterId(ZooKeeperWatcher watcher, String id)
       throws KeeperException {
-    ZKUtil.createSetData(watcher, watcher.clusterIdZNode, Bytes.toBytes(id));
+    ZKUtil.createSetData(watcher, watcher.clusterIdZNode, getZNodeData(id));
   }
-}
+
+  /**
+   * @param clusterid
+   * @return Content of the clusterid znode as a serialized pb with the pb
+   * magic as prefix.
+   */
+  static byte [] getZNodeData(final String clusterid) {
+    ZooKeeperProtos.ClusterId.Builder builder =
+      ZooKeeperProtos.ClusterId.newBuilder();
+    builder.setClusterId(clusterid);
+    return ProtobufUtil.prependPBMagic(builder.build().toByteArray());
+  }
+
+  /**
+   * @param data
+   * @return The clusterid extracted from the passed znode <code>data</code>
+   */
+  static String getZNodeClusterId(final byte [] data) {
+    if (data == null || data.length <= 0) return null;
+    // If no magic, something is seriously wrong.  Fail fast.
+    if (!ProtobufUtil.isPBMagicPrefix(data)) throw new RuntimeException("No magic preamble");
+    int prefixLen = ProtobufUtil.lengthOfPBMagic();
+    try {
+      ZooKeeperProtos.ClusterId clusterid =
+        ZooKeeperProtos.ClusterId.newBuilder().mergeFrom(data, prefixLen, data.length - prefixLen).build();
+      return clusterid.getClusterId();
+    } catch (InvalidProtocolBufferException e) {
+      // A failed parse of the znode is pretty catastrophic. Fail fast.
+      throw new RuntimeException(e);
+    }
+  }
+}

src/main/java/org/apache/hadoop/hbase/zookeeper/ClusterStatusTracker.java

@@ -24,9 +24,13 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.Abortable;
 import org.apache.hadoop.hbase.ClusterStatus;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.zookeeper.KeeperException;
 
+import com.google.protobuf.InvalidProtocolBufferException;
+
 /**
  * Tracker on cluster settings up in zookeeper.
  * This is not related to {@link ClusterStatus}.  That class is a data structure
@@ -52,7 +56,8 @@ public class ClusterStatusTracker extends ZooKeeperNodeTracker {
 
   /**
    * Checks if cluster is up.
-   * @return true if root region location is available, false if not
+   * @return true if the cluster up ('shutdown' is its name up in zk) znode
+   * exists with data, false if not
    */
   public boolean isClusterUp() {
     return super.getData(false) != null;
@@ -64,7 +69,7 @@ public class ClusterStatusTracker extends ZooKeeperNodeTracker {
    */
   public void setClusterUp()
   throws KeeperException {
-    byte [] upData = Bytes.toBytes(new java.util.Date().toString());
+    byte [] upData = getZNodeData();
     try {
       ZKUtil.createAndWatch(watcher, watcher.clusterStateZNode, upData);
     } catch(KeeperException.NodeExistsException nee) {
@@ -85,4 +90,15 @@ public class ClusterStatusTracker extends ZooKeeperNodeTracker {
           "state node (" + watcher.clusterStateZNode + ") not found");
     }
   }
+
+  /**
+   * @return Content of the clusterup znode as a serialized pb with the pb
+   * magic as prefix.
+   */
+  static byte [] getZNodeData() {
+    ZooKeeperProtos.ClusterUp.Builder builder =
+      ZooKeeperProtos.ClusterUp.newBuilder();
+    builder.setStartDate(new java.util.Date().toString());
+    return ProtobufUtil.prependPBMagic(builder.build().toByteArray());
+  }
 }

src/main/java/org/apache/hadoop/hbase/zookeeper/RootRegionTracker.java

@@ -113,7 +113,7 @@ public class RootRegionTracker extends ZooKeeperNodeTracker {
     LOG.info("Setting ROOT region location in ZooKeeper as " + location);
     // Make the RootRegionServer pb and then get its bytes and save this as
     // the znode content.
-    byte [] data = getRootRegionServerZNodeContent(location);
+    byte [] data = getZNodeData(location);
     try {
       ZKUtil.createAndWatch(zookeeper, zookeeper.rootServerZNode, data);
     } catch(KeeperException.NodeExistsException nee) {
@@ -127,7 +127,7 @@ public class RootRegionTracker extends ZooKeeperNodeTracker {
    * @param sn What to put into the znode.
    * @return The content of the root-region-server znode
    */
-  static byte [] getRootRegionServerZNodeContent(final ServerName sn) {
+  static byte [] getZNodeData(final ServerName sn) {
     // ZNode content is a pb message preceeded by some pb magic.
     HBaseProtos.ServerName pbsn =
       HBaseProtos.ServerName.newBuilder().setHostName(sn.getHostname()).

src/main/protobuf/ZooKeeper.proto

@@ -42,3 +42,21 @@ message Master {
   // The ServerName of the current Master
   required ServerName master = 1;
 }
+
+// TODO: Put these two cluster attributes into the one znode.
+/**
+ * Content of the '/hbase/hbaseid', cluster id, znode.
+ */
+message ClusterId {
+  // This is the cluster id, a uuid as a String
+  required string clusterId = 1;
+}
+
+/**
+ * Content of the '/hbase/shutdown', cluster state, znode.
+ */
+message ClusterUp {
+  // If this znode is present, cluster is up.  Currently
+  // the data is cluster startDate.
+  required string startDate = 1;
+}