Maxmind DatabaseReader Java heap space

Question

我尝试在 Spring 启动中使用 GeoLite2-City.mmdb 来获取位置数据。为此，我在配置文件中创建了一个这样的 bean：

@Bean   
public static synchronized DatabaseReader mmdbReader() throws IOException { 
if ( reader != null ) {
return reader;
}
ResourceLoader resourceLoader = new DefaultResourceLoader();
Resource resource = resourceLoader.getResource("classpath:static/mmdb/GeoLite2-City.mmdb");
InputStream database = resource.getInputStream();
reader = new DatabaseReader.Builder(database).fileMode(com.maxmind.db.Reader.FileMode.MEMORY)
.withCache(new CHMCache()).build(); 
return reader;
}

我还创建了一个 util 函数来检索位置，如下所示：

public static GeoLocation getLocation(HttpServletRequest request, DatabaseReader databaseReader) throws IOException, GeoIp2Exception{
if(request.getRemoteAddr().equals("0:0:0:0:0:0:0:1") || request.getRemoteAddr().equals("127.0.0.1")) {
return new GeoLocation("localhost", "Redmond", "USA", 47.673988, -122.121513);
}
InetAddress ipAddress = InetAddress.getByName(request.getRemoteAddr());
CityResponse response = databaseReader.city(ipAddress);
Country country = response.getCountry();
City city = response.getCity();
Location location = response.getLocation();
return new GeoLocation(ipAddress.toString(), city.getName(), country.getName(), location.getLatitude(), location.getLongitude());
}

但是，每次部署应用程序时都会收到此错误

Caused by: java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3236)
at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:118)
at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:153)
at com.maxmind.db.BufferHolder.<init>(BufferHolder.java:64)
at com.maxmind.db.Reader.<init>(Reader.java:89)
at com.maxmind.geoip2.DatabaseReader.<init>(DatabaseReader.java:64)
at com.maxmind.geoip2.DatabaseReader.<init>(DatabaseReader.java:54)
at com.maxmind.geoip2.DatabaseReader$Builder.build(DatabaseReader.java:160)
at com.microsoft.apie.configuration.ApplicationConfiguration.mmdbReader(ApplicationConfiguration.java:104)

我的 java 设置是：

-Xms512m -Xmx2048m

你能帮忙吗？

Answer 1

我通过这样做解决了这个问题：

一个。我从罐子中删除了文件GeoLite2-City.mmdb，并放在与罐子相同的文件夹中

二.我重构了该方法，并且：

@Bean  
public static synchronized DatabaseReader mmdbReader() throws IOException { 
if ( reader != null ) {
return reader;
}
/*ResourceLoader resourceLoader = new DefaultResourceLoader();
Resource resource = resourceLoader.getResource("classpath:static/mmdb/GeoLite2-Country.mmdb");
InputStream database = resource.getInputStream();
*/
FileSystemResource resource = new FileSystemResource("/path/to/file/GeoLite2-City.mmdb");
reader = new DatabaseReader.Builder(resource.getFile()).fileMode(com.maxmind.db.Reader.FileMode.MEMORY_MAPPED)
.withCache(new CHMCache()).build(); 
return reader;
}

c.重新打包应用程序，它可以工作！

感谢斯特雷洛克的建议