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HBASE-26036 DBB released too early in HRegion.get() and dirty data fo…
…r some operations (#3436) (#3486) Signed-off-by: Michael Stack <[email protected]>
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...e-common/src/main/java/org/apache/hadoop/hbase/io/DeallocateRewriteByteBuffAllocator.java
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/* | ||
* 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; | ||
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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; | ||
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/** | ||
* 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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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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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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