Avoid ConcurrentModificationException on java stream using cache

I'm getting occasionally ConcurrentModificationException with the following code:

public Set<MyObject> getTypes(Set<Type> names) {
        Set<MyObject> myObjects = new HashSet<>();          
        myObjects = names.stream().filter(Objects::nonNull).mapToInt(Type::getId)
                .mapToObj(cache::getMyObject)
                .collect(Collectors.toSet());

I'm using cache to convert to MyObject, but exception seems to thrown in collect method (DAOImpl.java line 114)

java.util.ConcurrentModificationException
        at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1558)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
        at com.dao.DAOImpl.getTypes(DAOImpl.java:114)
        at com.dao.DAOImpl$$FastClassBySpringCGLIB$$affe23c4.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)
        at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692)
        at com.dao.DAOImpl$$EnhancerBySpringCGLIB$$6000bd7e.getTypes(<generated>)

How can I use cache to map to objects, or must I use cache outside stream?

Notice cache should be updated only 1 per day

The issue was that 2 threads changed myObjects so the expected count of the Set when looping through it was compromised, therefore the exception

The fix was to make the above service call atomic and therefore to prevent changing Set on runtime with a different thread