Genius-pig commented on pull request #1795:
URL: https://github.com/apache/iotdb/pull/1795#issuecomment-705435803
@Ring-k @HTHou I run this test which tries to simulate benchmark, but it
can't repeat the bug.
```
/*
* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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*/
package org.apache.iotdb.db.integration;
import org.apache.iotdb.db.conf.IoTDBDescriptor;
import org.apache.iotdb.db.utils.EnvironmentUtils;
import org.apache.iotdb.jdbc.Config;
import org.apache.iotdb.tsfile.common.conf.TSFileConfig;
import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class IoTDBMultiThreadIT {
private static final TSFileConfig tsFileConfig =
TSFileDescriptor.getInstance().getConfig();
private static int maxNumberOfPointsInPage;
private static int pageSizeInByte;
private static int groupSizeInByte;
@BeforeClass
public static void setUp() throws Exception {
EnvironmentUtils.closeStatMonitor();
// use small page setting
// origin value
maxNumberOfPointsInPage = tsFileConfig.getMaxNumberOfPointsInPage();
pageSizeInByte = tsFileConfig.getPageSizeInByte();
groupSizeInByte = tsFileConfig.getGroupSizeInByte();
// new value
tsFileConfig.setMaxNumberOfPointsInPage(1000);
tsFileConfig.setPageSizeInByte(1024 * 150);
tsFileConfig.setGroupSizeInByte(1024 * 1000);
IoTDBDescriptor.getInstance().getConfig().setMemtableSizeThreshold(1024 * 1000);
EnvironmentUtils.envSetUp();
}
@AfterClass
public static void tearDown() throws Exception {
// recovery value
tsFileConfig.setMaxNumberOfPointsInPage(maxNumberOfPointsInPage);
tsFileConfig.setPageSizeInByte(pageSizeInByte);
tsFileConfig.setGroupSizeInByte(groupSizeInByte);
IoTDBDescriptor.getInstance().getConfig().setMemtableSizeThreshold(groupSizeInByte);
EnvironmentUtils.cleanEnv();
}
@Test
public void testMultiInsert() throws SQLException,
ClassNotFoundException {
Class.forName(Config.JDBC_DRIVER_NAME);
try (Connection connection = DriverManager
.getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/",
"root", "root");
Statement statement = connection.createStatement()) {
ExecutorService service = Executors.newFixedThreadPool(10);
for (int i = 0; i < 30; i++) {
int finalI = i;
service.submit(() -> {
for(int j = 0; j < 1000; j++) {
try {
statement.execute(createSQL(finalI,j));
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
});
}
}
}
private String createSQL(int i, int j) {
StringBuilder sql = new StringBuilder("insert into root.vehicle.d" +
i + j + "(timestamp");
for(int n = 0; n < 1000; n++) {
sql.append(",s").append(n);
}
sql.append(")");
sql.append(" values(").append(j);
for(int n = 0; n < 1000; n++) {
char s = rndChar();
sql.append(",'").append(s).append(n).append("'");
}
sql.append(")");
return sql.toString();
}
private static char rndChar () {
int rnd = (int) (Math.random() * 52); // or use Random or whatever
char base = (rnd < 26) ? 'A' : 'a';
return (char) (base + rnd % 26);
}
}
```
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