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HBASE-10079 Race in TableName cache 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1548020 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jonathan Hsieh 2013-12-05 06:16:30 +00:00
parent 5fbbef29f3
commit 3fb88f10af
2 changed files with 15 additions and 16 deletions
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18
hbase-common/src/main/java/org/apache/hadoop/hbase/TableName.java
View File

@ -248,7 +248,7 @@ public final class TableName implements Comparable<TableName> {
*/
private TableName(ByteBuffer namespace, ByteBuffer qualifier) throws IllegalArgumentException {
this.qualifier = new byte[qualifier.remaining()];
qualifier.get(this.qualifier);
qualifier.duplicate().get(this.qualifier);
this.qualifierAsString = Bytes.toString(this.qualifier);
if (qualifierAsString.equals(OLD_ROOT_STR)) {
@ -275,7 +275,7 @@ public final class TableName implements Comparable<TableName> {
this.systemTable = true;
} else {
this.namespace = new byte[namespace.remaining()];
namespace.get(this.namespace);
namespace.duplicate().get(this.namespace);
this.namespaceAsString = Bytes.toString(this.namespace);
this.systemTable = false;
}
@ -325,15 +325,15 @@ public final class TableName implements Comparable<TableName> {
TableName newTable = new TableName(bns, qns);
if (tableCache.add(newTable)) { // Adds the specified element if it is not already present
return newTable;
} else {
// Someone else added it. Let's find it.
for (TableName tn : tableCache) {
if (Bytes.equals(tn.getQualifier(), qns) && Bytes.equals(tn.getNamespace(), bns)) {
return tn;
}
}
}
// Someone else added it. Let's find it.
for (TableName tn : tableCache) {
if (Bytes.equals(tn.getQualifier(), qns) && Bytes.equals(tn.getNamespace(), bns)) {
return tn;
}
}
// this should never happen.
throw new IllegalStateException(newTable + " was supposed to be in the cache");
}

13
hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
View File

@ -1279,19 +1279,18 @@ public class Bytes {
* @param b right operand
* @return True if equal
*/
public static boolean equals(byte[] a, ByteBuffer b) {
if (a == null) return b == null;
if (b == null) return false;
if (a.length != b.remaining()) return false;
public static boolean equals(byte[] a, ByteBuffer buf) {
if (a == null) return buf == null;
if (buf == null) return false;
if (a.length != buf.remaining()) return false;
b.mark();
// Thou shalt not modify the original byte buffer in what should be read only operations.
ByteBuffer b = buf.duplicate();
for (byte anA : a) {
if (anA != b.get()) {
b.reset();
return false;
}
}
b.reset();
return true;
}