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Exclude enpoint from security:
- WebSecurityConfigurerAdapter override:
@Override
public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/path/**");
}

cherniag

1. CachedIntrospectionResults.<init> takes a lot of time. Every BeanWrapper passes from CachedIntrospectionResults.forClass, it inokes
 (if absent in static cache) Introspector.getBeanInfo which takes a lot of time. Cache usage occurs at 
AbstractApplicationContext.finishBeanFactoryInitialization in scope of refresh() method but at the end of refresh method in finally block 
there is call to resetCommonCaches:
 
protected void resetCommonCaches() {
		ReflectionUtils.clearCache();
		ResolvableType.clearCache();
		CachedIntrospectionResults.clearClassLoader(getClassLoader()); // <---- remove it
	}

cherniag

annotation: @PreAuthorize("hasRole('ROLE_DELETE_ALL_SOURCES'))
actual entry point: org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler#createSecurityExpressionRoot

cherniag

1. Create index
curl -X PUT "http://<>:9200/index-name" -d '{
  "mappings": {
    "record": {
      "properties": {
        "actionStartedOn": {
          "type": "date"
        },
        "rddCount": {
          "type": "long"

cherniag

1.Import csv file to hdfs:
export HADOOP_USER_NAME=impala
./hadoop fs -put /Users/gennadii/dev/performance_impala.csv hdfs://<host>:<port>/user/impala/performance_impala.csv

2.Create IDEA datasource Impala using Impala JDBC driver (all jars in zip)

3.Create connection
jdbc:impala://<host>:<port>

4.Create table (the same name as file):

cherniag

org.springframework.boot.BeanDefinitionLoader



parse @Config classes:
org.springframework.context.support.AbstractApplicationContext#refresh ->
org.springframework.context.support.AbstractApplicationContext#invokeBeanFactoryPostProcessors ->
org.springframework.context.annotation.ConfigurationClassPostProcessor#postProcessBeanDefinitionRegistry ->
org.springframework.context.annotation.ConfigurationClassPostProcessor#processConfigBeanDefinitions ->
org.springframework.context.annotation.ConfigurationClassParser#parse

cherniag

TransactionSynchronizationManager.registerSynchronization(
                    new TransactionSynchronizationAdapter() {
                        @Override
                        public void afterCommit() {
                            fireAfterSaveEvent(oldSourceFinal, updatedSource);
                        }
                    }
            );

cherniag

sudo /usr/java/jdk1.8.0_60/bin/jstack -F -m 29186
print stacktrace for every thread, -m includes native

sudo /usr/java/jdk1.8.0_60/bin/jmap -histo:live 29186
prints histogram of java objects

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# Execute select:
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor#executeSelect
# Build object form row:
org.eclipse.persistence.internal.descriptors.ObjectBuilder#buildObject
org.eclipse.persistence.internal.descriptors.ObjectBuilder#buildWorkingCopyCloneFromRow

# Profile:
interface:  org.eclipse.persistence.sessions.SessionProfiler
eclipselink.profiler=org.eclipse.persistence.tools.profiler.PerformanceProfiler

cherniag

org.springframework.web.filter.DelegatingFilterProxy#doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)
if (delegateToUse == null)
		WebApplicationContext wac = findWebApplicationContext()
		delegate = wac.getBean("springSecurityFilterChain, Filter.class)
org.springframework.web.filter.DelegatingFilterProxy#invokeDelegate(delegate, request, response, filterChain)
delegate.doFilter(request, response, filterChain)
		org.springframework.security.web.FilterChainProxy#doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
		org.springframework.security.web.FilterChainProxy#doFilterInternal(ServletRequest request, ServletResponse response, FilterChain chain)
		List<Filter> filters = getFilters(fwRequest)
				for (SecurityFilterChain chain : filterChains)