Spring Boot – Configure maxSwallowSize in embedded Tomcat
In Spring Boot, you can’t configure the embedded Tomcat maxSwallowSize via the common application properties, there is no option like server.tomcat.*.maxSwallowSize
Solution
To fix it, you need to declare a TomcatEmbeddedServletContainerFactory bean and configure the maxSwallowSize like this :
//...
import org.apache.coyote.http11.AbstractHttp11Protocol;
import org.springframework.boot.context.embedded.tomcat.TomcatConnectorCustomizer;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
private int maxUploadSizeInMb = 10 * 1024 * 1024; // 10 MB
@Bean
public TomcatEmbeddedServletContainerFactory tomcatEmbedded() {
TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
tomcat.addConnectorCustomizers((TomcatConnectorCustomizer) connector -> {
// connector other settings...
// configure maxSwallowSize
if ((connector.getProtocolHandler() instanceof AbstractHttp11Protocol<?>)) {
// -1 means unlimited, accept bytes
((AbstractHttp11Protocol<?>) connector.getProtocolHandler()).setMaxSwallowSize(-1);
}
});
return tomcat;
}
References
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The configuration like above didn’t help me(I’m using spring boot 1.5.10)
After some hours of research i found that the solution was to set
application.properties:
spring.http.multipart.max-file-size=10MB
spring.http.multipart.max-request-size=10MB
and all uploads works OK without configurating Tomcat.
(before i’ve trying alot with
spring.servlet.multipart.max-file-size=
spring.servlet.multipart.max-request-size=
and found that them didn’t work i.e. didn’t limit the file size, that helps me to find the answer)
BR, Alex
In Spring 2.0 it is simple – server.tomcat.max-http-post-size=2MB
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#common-application-properties
In SpringBoot2 things changed:
https://stackoverflow.com/questions/47700115/tomcatembeddedservletcontainerfactory-is-missing-in-spring-boot-2
@Bean
public TomcatServletWebServerFactory containerFactory() {
return new TomcatServletWebServerFactory() {
protected void customizeConnector(Connector connector) {
int maxSize = 50000000;
super.customizeConnector(connector);
connector.setMaxPostSize(maxSize);
connector.setMaxSavePostSize(maxSize);
if (connector.getProtocolHandler() instanceof AbstractHttp11Protocol) {
((AbstractHttp11Protocol ) connector.getProtocolHandler()).setMaxSwallowSize(maxSize);
logger.info(“Set MaxSwallowSize “+ maxSize);
}
}
};
}
spring-boot 2.0
# MULTIPART (MultipartProperties)
spring.servlet.multipart.enabled=true # Whether to enable support of multipart uploads.
spring.servlet.multipart.file-size-threshold=0 # Threshold after which files are written to disk. Values can use the suffixes “MB” or “KB” to indicate megabytes or kilobytes, respectively.
spring.servlet.multipart.location= # Intermediate location of uploaded files.
spring.servlet.multipart.max-file-size=1MB # Max file size. Values can use the suffixes “MB” or “KB” to indicate megabytes or kilobytes, respectively.
spring.servlet.multipart.max-request-size=10MB # Max request size. Values can use the suffixes “MB” or “KB” to indicate megabytes or kilobytes, respectively.
spring.servlet.multipart.resolve-lazily=false # Whether to resolve the multipart request lazily at the time of file or parameter access.
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#common-application-properties
Tried this with no success. I’ve checked and setMaxSwallowSize(-1) is executed but I still get connection reset on large files.
I created a new class and but the above code in there annotating the class as @Configuration, but nothing helps sadly. I am new to using Spring and don’t know what to do. Hope you can help.