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HBASE-26036 DBB released too early in HRegion.get() and dirty data fo…
…r some operations (apache#3436) Signed-off-by: Michael Stack <stack@apache.org>
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...e-common/src/main/java/org/apache/hadoop/hbase/io/DeallocateRewriteByteBuffAllocator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.hadoop.hbase.io; | ||
|
|
||
| import java.nio.ByteBuffer; | ||
| import org.apache.hadoop.hbase.util.Bytes; | ||
| import org.apache.yetus.audience.InterfaceAudience; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * A ByteBuffAllocator that rewrite the bytebuffers right after released. | ||
| * It can be used for test whether there are prematurely releasing backing bytebuffers. | ||
| */ | ||
| @InterfaceAudience.Private | ||
| public class DeallocateRewriteByteBuffAllocator extends ByteBuffAllocator { | ||
| private static final Logger LOG = LoggerFactory.getLogger( | ||
| DeallocateRewriteByteBuffAllocator.class); | ||
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|
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| DeallocateRewriteByteBuffAllocator(boolean reservoirEnabled, int maxBufCount, int bufSize, | ||
| int minSizeForReservoirUse) { | ||
| super(reservoirEnabled, maxBufCount, bufSize, minSizeForReservoirUse); | ||
| } | ||
|
|
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| @Override | ||
| protected void putbackBuffer(ByteBuffer buf) { | ||
| if (buf.capacity() != bufSize || (reservoirEnabled ^ buf.isDirect())) { | ||
| LOG.warn("Trying to put a buffer, not created by this pool! Will be just ignored"); | ||
| return; | ||
| } | ||
| buf.clear(); | ||
| byte[] tmp = generateTmpBytes(buf.capacity()); | ||
| buf.put(tmp, 0, tmp.length); | ||
| super.putbackBuffer(buf); | ||
| } | ||
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|
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| private byte[] generateTmpBytes(int length) { | ||
| StringBuilder result = new StringBuilder(); | ||
| while (result.length() < length) { | ||
| result.append("-"); | ||
| } | ||
| return Bytes.toBytes(result.substring(0, length)); | ||
| } | ||
| } |
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