Important Notice
Thank you for opening an issue! Please note that, as outlined in the README, I currently only work on feature requests or bug fixes when sponsored. Balancing this project with professional and personal priorities means I have a very limited amount of effort I can divert to this project.
You must put in the work to address this issue, or it won't be addressed.
Querydsl fails to generate and execute queries inside threads used by Spring to handle requests. The following simple code:
@RestController
@SpringBootApplication
public class TestApplication {
private static final List<Cat> CATS = List.of(new Cat("Felix"), new Cat("Garfield"));
public static void main(final String[] args) {
SpringApplication.run(TestApplication.class, args);
}
@RequestMapping("/")
public List<Cat> home() {
return CollQueryFactory.from(QCat.cat, CATS)
.where(QCat.cat.name.eq("Garfield"))
.stream()
.toList();
}
}produces this error:
2025-01-29T09:42:03.822+01:00 ERROR 1190827 --- [test] [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: com.querydsl.codegen.utils.CodegenException: Compilation of public class Q_252532505_1275614662_1275614662_1195259493 {
public static Iterable<com.example.Cat> eval(Iterable<com.example.Cat> cat_, String a1) {
java.util.List<com.example.Cat> rv = new java.util.ArrayList<com.example.Cat>();
for (com.example.Cat cat : cat_) {
try {
if (com.querydsl.collections.CollQueryFunctions.equals(cat.getName(), a1)) {
rv.add(cat);
}
} catch (NullPointerException npe) { }
}
return rv; }
}
failed.
/Q_252532505_1275614662_1275614662_1195259493.java:3: error: package com.example does not exist
public static Iterable<com.example.Cat> eval(Iterable<com.example.Cat> cat_, String a1) {
^
/Q_252532505_1275614662_1275614662_1195259493.java:3: error: package com.example does not exist
public static Iterable<com.example.Cat> eval(Iterable<com.example.Cat> cat_, String a1) {
^
/Q_252532505_1275614662_1275614662_1195259493.java:4: error: package com.example does not exist
java.util.List<com.example.Cat> rv = new java.util.ArrayList<com.example.Cat>();
^
/Q_252532505_1275614662_1275614662_1195259493.java:4: error: package com.example does not exist
java.util.List<com.example.Cat> rv = new java.util.ArrayList<com.example.Cat>();
^
/Q_252532505_1275614662_1275614662_1195259493.java:5: error: package com.example does not exist
for (com.example.Cat cat : cat_) {
^
/Q_252532505_1275614662_1275614662_1195259493.java:7: error: package com.querydsl.collections does not exist
if (com.querydsl.collections.CollQueryFunctions.equals(cat.getName(), a1)) {
^
6 errors
] with root cause
com.querydsl.codegen.utils.CodegenException: Compilation of public class Q_252532505_1275614662_1275614662_1195259493 {
public static Iterable<com.example.Cat> eval(Iterable<com.example.Cat> cat_, String a1) {
java.util.List<com.example.Cat> rv = new java.util.ArrayList<com.example.Cat>();
for (com.example.Cat cat : cat_) {
try {
if (com.querydsl.collections.CollQueryFunctions.equals(cat.getName(), a1)) {
rv.add(cat);
}
} catch (NullPointerException npe) { }
}
return rv; }
}
failed.
/Q_252532505_1275614662_1275614662_1195259493.java:3: error: package com.example does not exist
public static Iterable<com.example.Cat> eval(Iterable<com.example.Cat> cat_, String a1) {
^
/Q_252532505_1275614662_1275614662_1195259493.java:3: error: package com.example does not exist
public static Iterable<com.example.Cat> eval(Iterable<com.example.Cat> cat_, String a1) {
^
/Q_252532505_1275614662_1275614662_1195259493.java:4: error: package com.example does not exist
java.util.List<com.example.Cat> rv = new java.util.ArrayList<com.example.Cat>();
^
/Q_252532505_1275614662_1275614662_1195259493.java:4: error: package com.example does not exist
java.util.List<com.example.Cat> rv = new java.util.ArrayList<com.example.Cat>();
^
/Q_252532505_1275614662_1275614662_1195259493.java:5: error: package com.example does not exist
for (com.example.Cat cat : cat_) {
^
/Q_252532505_1275614662_1275614662_1195259493.java:7: error: package com.querydsl.collections does not exist
if (com.querydsl.collections.CollQueryFunctions.equals(cat.getName(), a1)) {
^
6 errors
at com.querydsl.codegen.utils.JDKEvaluatorFactory.compile(JDKEvaluatorFactory.java:83) ~[querydsl-codegen-utils-6.10.1.jar:na]
at com.querydsl.codegen.utils.AbstractEvaluatorFactory.createEvaluator(AbstractEvaluatorFactory.java:146) ~[querydsl-codegen-utils-6.10.1.jar:na]
at com.querydsl.collections.DefaultEvaluatorFactory.createEvaluator(DefaultEvaluatorFactory.java:164) ~[querydsl-collections-6.10.1.jar:na]
at com.querydsl.collections.DefaultQueryEngine.evaluateSingleSource(DefaultQueryEngine.java:175) ~[querydsl-collections-6.10.1.jar:na]
at com.querydsl.collections.DefaultQueryEngine.list(DefaultQueryEngine.java:89) ~[querydsl-collections-6.10.1.jar:na]
at com.querydsl.collections.AbstractCollQuery.fetch(AbstractCollQuery.java:195) ~[querydsl-collections-6.10.1.jar:na]
at com.querydsl.collections.AbstractCollQuery.stream(AbstractCollQuery.java:188) ~[querydsl-collections-6.10.1.jar:na]
at com.example.TestApplication.home(TestApplication.java:29) ~[classes/:na]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:257) ~[spring-web-6.2.2.jar:6.2.2]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:190) ~[spring-web-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:986) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:891) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1088) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:978) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) ~[spring-webmvc-6.2.2.jar:6.2.2]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) ~[spring-webmvc-6.2.2.jar:6.2.2]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) ~[tomcat-embed-core-10.1.34.jar:6.0]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) ~[spring-webmvc-6.2.2.jar:6.2.2]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-10.1.34.jar:6.0]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-10.1.34.jar:10.1.34]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-6.2.2.jar:6.2.2]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.2.2.jar:6.2.2]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-6.2.2.jar:6.2.2]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.2.2.jar:6.2.2]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-6.2.2.jar:6.2.2]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.2.2.jar:6.2.2]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:397) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:905) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) ~[tomcat-embed-core-10.1.34.jar:10.1.34]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
I found one workaround that seems to fix the issue. That is to run a dummy query in the main thread at the startup of the application. If I modify the main method like this then the issue goes away.
public static void main(final String[] args) {
SpringApplication.run(TestApplication.class, args);
CollQueryFactory.from(QCat.cat, CATS)
.where(QCat.cat.name.eq("Garfield"))
.stream()
.toList();
}I'm not sure what the issue is, but the workaround I found seems to indicate that this has something to do with threads and possible classpaths and classloaders.
Here is a repository that contains the minimal code required to reproduce this bug: https://github.com/rnilss47/querydsl-reproduce-collections-bug.
I am willing to put in the work and fix the issue, but I am not sure what change needs to be made.
Important Notice
Thank you for opening an issue! Please note that, as outlined in the README, I currently only work on feature requests or bug fixes when sponsored. Balancing this project with professional and personal priorities means I have a very limited amount of effort I can divert to this project.
You must put in the work to address this issue, or it won't be addressed.
Querydsl fails to generate and execute queries inside threads used by Spring to handle requests. The following simple code:
produces this error:
I found one workaround that seems to fix the issue. That is to run a dummy query in the main thread at the startup of the application. If I modify the main method like this then the issue goes away.
I'm not sure what the issue is, but the workaround I found seems to indicate that this has something to do with threads and possible classpaths and classloaders.
Here is a repository that contains the minimal code required to reproduce this bug: https://github.com/rnilss47/querydsl-reproduce-collections-bug.
I am willing to put in the work and fix the issue, but I am not sure what change needs to be made.