Apache
/
lucene
mirror of https://github.com/apache/lucene.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Harden (Cloud)ExitableDirectoryReaderTest 

Thread.sleep() is "subject to the precision and accuracy of system timers and schedulers."

But tests using DelayingSearchComponent need to ensure that it sleeps *at least* as long as they request, in order to trigger the timeAllowed constraint
This commit is contained in:
Chris Hostetter 2019-12-17 13:54:33 -07:00
parent 3e8872738a
commit 8493cf18cb
1 changed files with 23 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
solr/core/src/test/org/apache/solr/search/DelayingSearchComponent.java
View File

@ -16,11 +16,12 @@
*/
package org.apache.solr.search;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import org.apache.solr.handler.component.ResponseBuilder;
import org.apache.solr.handler.component.SearchComponent;
import java.io.IOException;
/**
* Search component used to add delay to each request.
*/
@ -33,13 +34,27 @@ public class DelayingSearchComponent extends SearchComponent{
@Override
public void process(ResponseBuilder rb) throws IOException {
int sleep = rb.req.getParams().getInt("sleep",0);
try {
if (sleep > 0) {
Thread.sleep(sleep);
final long totalSleepMillis = rb.req.getParams().getLong("sleep",0);
if (totalSleepMillis > 0) {
final long totalSleepNanos = TimeUnit.NANOSECONDS.convert(totalSleepMillis, TimeUnit.MILLISECONDS);
final long startNanos = System.nanoTime();
try {
// Thread.sleep() (and derivatives) are not garunteed to sleep the full amount:
// "subject to the precision and accuracy of system timers and schedulers."
// This is particularly problematic on Windows VMs, so we do a retry loop
// to ensure we sleep a total of at least as long as requested
//
// (Tests using this component do so explicitly to ensure 'timeAllowed'
// has exceeded in order to get their expected results, we would rather over-sleep
// then under sleep)
for (long sleepNanos = totalSleepNanos;
0 < sleepNanos;
sleepNanos = totalSleepNanos - (System.nanoTime() - startNanos)) {
TimeUnit.NANOSECONDS.sleep(sleepNanos);
}
} catch (InterruptedException e) {
// Do nothing?
}
} catch (InterruptedException e) {
// Do nothing?
}
}