zookeeper查看事务日志

zookeeper的事务日志通过zoo.cfg文件中的dataLogDir配置项配置，文件如下：

zookeeper提供了查看事务日志的工具类LogFormatter ，运行：

 java -classpath .:slf4j-api-1.6.1.jar:zookeeper-3.4.5.jar org.apache.zookeeper.server.LogFormatter /export1/zookeeper/logs/version-2/log.1000003d2 

将看到格式化的日志内容类似：

ZooKeeper Transactional Log File with dbid 0 txnlog format version 25/12/14 7:06:31 PM CST session 0x145ef610b530000 cxid 0x229e zxid 0x1000003e8 delete '/hbase/region-in-transition/e3d18e83988febe321e563f0852101275/12/14 7:06:31 PM CST session 0x245ef610b52004c cxid 0x0 zxid 0x1000003e9 createSession 400005/12/14 7:06:31 PM CST session 0x245ef610b52004c cxid 0x3 zxid 0x1000003ea closeSession null5/12/14 7:06:31 PM CST session 0x545f01346c60001 cxid 0x0 zxid 0x1000003eb createSession 400005/12/14 7:06:31 PM CST session 0x545f01346c60001 cxid 0x3 zxid 0x1000003ec closeSession null5/12/14 7:06:32 PM CST session 0x445f018d5e00002 cxid 0x0 zxid 0x1000003ed createSession 400005/12/14 7:06:32 PM CST session 0x445f018d5e00002 cxid 0x3 zxid 0x1000003ee closeSession null5/12/14 7:06:32 PM CST session 0x145ef610b530000 cxid 0x22a1 zxid 0x1000003ef setData '/hbase/table/wyp,#ffffffff000146d61737465723a36303030303b36ffffffc765ffffffb0ffffffa5ffffffa3745042554681,55/12/14 7:06:32 PM CST session 0x145ef610b530000 cxid 0x22a3 zxid 0x1000003f0 delete '/hbase/table-lock/wyp/write-master:6000000000000025/12/14 7:06:32 PM CST session 0x145ef610b530033 cxid 0x0 zxid 0x1000003f1 createSession 400005/12/14 7:06:32 PM CST session 0x145ef610b530033 cxid 0x3 zxid 0x1000003f2 closeSession null

LogFormatter 类代码如下：

/** * 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.zookeeper.server;import java.io.ByteArrayInputStream;import java.io.EOFException;import java.io.FileInputStream;import java.io.IOException;import java.text.DateFormat;import java.util.Date;import java.util.zip.Adler32;import java.util.zip.Checksum;import org.apache.jute.BinaryInputArchive;import org.apache.jute.InputArchive;import org.apache.jute.Record;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.apache.zookeeper.server.persistence.FileHeader;import org.apache.zookeeper.server.persistence.FileTxnLog;import org.apache.zookeeper.server.util.SerializeUtils;import org.apache.zookeeper.txn.TxnHeader;public class LogFormatter {    private static final Logger LOG = LoggerFactory.getLogger(LogFormatter.class);    /**     * @param args     */    public static void main(String[] args) throws Exception {        if (args.length != 1) {            System.err.println("USAGE: LogFormatter log_file");            System.exit(2);        }        FileInputStream fis = new FileInputStream(args[0]);        BinaryInputArchive logStream = BinaryInputArchive.getArchive(fis);        FileHeader fhdr = new FileHeader();        fhdr.deserialize(logStream, "fileheader");        if (fhdr.getMagic() != FileTxnLog.TXNLOG_MAGIC) {            System.err.println("Invalid magic number for " + args[0]);            System.exit(2);        }        System.out.println("ZooKeeper Transactional Log File with dbid "                + fhdr.getDbid() + " txnlog format version "                + fhdr.getVersion());        int count = 0;        while (true) {            long crcValue;            byte[] bytes;            try {                crcValue = logStream.readLong("crcvalue");                bytes = logStream.readBuffer("txnEntry");            } catch (EOFException e) {                System.out.println("EOF reached after " + count + " txns.");                return;            }            if (bytes.length == 0) {                // Since we preallocate, we define EOF to be an                // empty transaction                System.out.println("EOF reached after " + count + " txns.");                return;            }            Checksum crc = new Adler32();            crc.update(bytes, 0, bytes.length);            if (crcValue != crc.getValue()) {                throw new IOException("CRC doesn't match " + crcValue +                        " vs " + crc.getValue());            }            TxnHeader hdr = new TxnHeader();            Record txn = SerializeUtils.deserializeTxn(bytes, hdr);            System.out.println(DateFormat.getDateTimeInstance(DateFormat.SHORT,                    DateFormat.LONG).format(new Date(hdr.getTime()))                    + " session 0x"                    + Long.toHexString(hdr.getClientId())                    + " cxid 0x"                    + Long.toHexString(hdr.getCxid())                    + " zxid 0x"                    + Long.toHexString(hdr.getZxid())                    + " " + TraceFormatter.op2String(hdr.getType()) + " " + txn);            if (logStream.readByte("EOR") != 'B') {                LOG.error("Last transaction was partial.");                throw new EOFException("Last transaction was partial.");            }            count++;        }    }}