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fixed #227 , loadBinlogChecksum NPE

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agapple
2016-12-30 14:51:22 +08:00
parent a1207060bf
commit a483f03711
1 changed files with 14 additions and 12 deletions
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22
parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlConnection.java
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@@ -37,7 +37,7 @@ public class MysqlConnection implements ErosaConnection {
private Charset charset = Charset.forName("UTF-8"); private Charset charset = Charset.forName("UTF-8");
private BinlogFormat binlogFormat; private BinlogFormat binlogFormat;
private BinlogImage binlogImage; private BinlogImage binlogImage;
private int binlogChecksum; private int binlogChecksum;
public MysqlConnection(){ public MysqlConnection(){
} }
@@ -117,7 +117,7 @@ public class MysqlConnection implements ErosaConnection {
LogDecoder decoder = new LogDecoder(LogEvent.UNKNOWN_EVENT, LogEvent.ENUM_END_EVENT); LogDecoder decoder = new LogDecoder(LogEvent.UNKNOWN_EVENT, LogEvent.ENUM_END_EVENT);
LogContext context = new LogContext(); LogContext context = new LogContext();
context.setLogPosition(new LogPosition(binlogfilename)); context.setLogPosition(new LogPosition(binlogfilename));
context.setFormatDescription(new FormatDescriptionLogEvent(4,binlogChecksum)); context.setFormatDescription(new FormatDescriptionLogEvent(4, binlogChecksum));
while (fetcher.fetch()) { while (fetcher.fetch()) {
LogEvent event = null; LogEvent event = null;
event = decoder.decode(fetcher, context); event = decoder.decode(fetcher, context);
@@ -204,7 +204,7 @@ public class MysqlConnection implements ErosaConnection {
// 如果不设置会出现错误： Slave can not handle replication events with the // 如果不设置会出现错误： Slave can not handle replication events with the
// checksum that master is configured to log // checksum that master is configured to log
// 但也不能乱设置，需要和mysql server的checksum配置一致，不然RotateLogEvent会出现乱码 // 但也不能乱设置，需要和mysql server的checksum配置一致，不然RotateLogEvent会出现乱码
// '@@global.binlog_checksum'需要去掉单引号,在mysql 5.6.29下导致master退出 // '@@global.binlog_checksum'需要去掉单引号,在mysql 5.6.29下导致master退出
update("set @master_binlog_checksum= @@global.binlog_checksum"); update("set @master_binlog_checksum= @@global.binlog_checksum");
} catch (Exception e) { } catch (Exception e) {
if (!StringUtils.contains(e.getMessage(), "Unknown system variable")) { if (!StringUtils.contains(e.getMessage(), "Unknown system variable")) {
@@ -266,12 +266,14 @@ public class MysqlConnection implements ErosaConnection {
throw new IllegalStateException("unexpected binlog image query result:" + rs.getFieldValues()); throw new IllegalStateException("unexpected binlog image query result:" + rs.getFieldValues());
} }
} }
/** /**
* 获取主库checksum信息 * 获取主库checksum信息
* https://dev.mysql.com/doc/refman/5.6/en/replication-options-binary-log.html#option_mysqld_binlog-checksum * https://dev.mysql.com/doc/refman/5.6/en/replication-options
* -binary-log.html#option_mysqld_binlog-checksum
*/ */
private void loadBinlogChecksum(){ private void loadBinlogChecksum() {
ResultSetPacket rs = null; ResultSetPacket rs = null;
try { try {
rs = query("select @master_binlog_checksum"); rs = query("select @master_binlog_checksum");
} catch (IOException e) { } catch (IOException e) {
@@ -279,10 +281,10 @@ public class MysqlConnection implements ErosaConnection {
} }
List<String> columnValues = rs.getFieldValues(); List<String> columnValues = rs.getFieldValues();
if(columnValues.get(0).toUpperCase().equals("CRC32")){ if (columnValues != null && columnValues.size() >= 1 && columnValues.get(0).toUpperCase().equals("CRC32")) {
binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_CRC32; binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_CRC32;
}else{ } else {
binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_OFF; binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_OFF;
} }
} }