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https://issues.apache.org/jira/browse/GEODE-8965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17298277#comment-17298277
]
ASF GitHub Bot commented on GEODE-8965:
---------------------------------------
ringles commented on a change in pull request #6085:
URL: https://github.com/apache/geode/pull/6085#discussion_r590647943
##########
File path:
geode-redis/src/distributedTest/java/org/apache/geode/redis/OutOfMemoryDUnitTest.java
##########
@@ -0,0 +1,175 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
contributor license
+ * agreements. See the NOTICE file distributed with this work for additional
information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache
License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express
+ * or implied. See the License for the specific language governing permissions
and limitations under
+ * the License.
+ */
+
+package org.apache.geode.redis;
+
+import static
org.apache.geode.distributed.ConfigurationProperties.MAX_WAIT_TIME_RECONNECT;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatNoException;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import java.util.Arrays;
+import java.util.Properties;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.exceptions.JedisException;
+
+import org.apache.geode.test.awaitility.GeodeAwaitility;
+import org.apache.geode.test.dunit.IgnoredException;
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+import org.apache.geode.test.junit.rules.ExecutorServiceRule;
+
+@SuppressWarnings("unchecked")
+public class OutOfMemoryDUnitTest {
+
+ @ClassRule
+ public static RedisClusterStartupRule clusterStartUp = new
RedisClusterStartupRule(4);
+
+ @Rule
+ public ExecutorServiceRule executor = new ExecutorServiceRule();
+
+ private static final String expectedEx = "Member: .*? above .*? critical
threshold";
+ public static final String FILLER_KEY = "fillerKey-";
+ private static final String LOCAL_HOST = "127.0.0.1";
+ public static final int KEY_TTL_SECONDS = 10;
+ private static final int MAX_ITERATION_COUNT = 4000;
+ public static final int VALUE_SIZE = 128 * 1024;
+ private static final int JEDIS_TIMEOUT =
+ Math.toIntExact(GeodeAwaitility.getTimeout().toMillis());
+ private static Jedis jedis1;
+ private static Jedis jedis2;
+
+ private static Properties locatorProperties;
+ private static Properties serverProperties;
+
+ private static MemberVM locator;
+ private static MemberVM server1;
+ private static MemberVM server2;
+
+ private static int redisServerPort1;
+ private static int redisServerPort2;
+ private static String valueString = "";
+
+ @BeforeClass
+ public static void classSetup() {
+ IgnoredException.addIgnoredException(expectedEx);
+ locatorProperties = new Properties();
+ serverProperties = new Properties();
+ locatorProperties.setProperty(MAX_WAIT_TIME_RECONNECT, "15000");
+
+ locator = clusterStartUp.startLocatorVM(0, locatorProperties);
+ server1 = clusterStartUp.startRedisVM(1, serverProperties,
locator.getPort());
+ server2 = clusterStartUp.startRedisVM(2, serverProperties,
locator.getPort());
+
+ server1.getVM().invoke(() -> {
+
RedisClusterStartupRule.getCache().getResourceManager().setCriticalHeapPercentage(5.0F);
+ });
+ server2.getVM().invoke(() -> {
+
RedisClusterStartupRule.getCache().getResourceManager().setCriticalHeapPercentage(5.0F);
+ });
+
+ redisServerPort1 = clusterStartUp.getRedisPort(1);
+ redisServerPort2 = clusterStartUp.getRedisPort(2);
+
+ jedis1 = new Jedis(LOCAL_HOST, redisServerPort1, JEDIS_TIMEOUT);
+ jedis2 = new Jedis(LOCAL_HOST, redisServerPort2, JEDIS_TIMEOUT);
+
+ char[] largeCharData = new char[VALUE_SIZE];
+ Arrays.fill(largeCharData, 'a');
+ valueString = new String(largeCharData);
+
+ }
+
+ @Before
+ public void testSetup() {
+ jedis1.flushAll();
+ }
+
+ @AfterClass
+ public static void tearDown() {
+ jedis1.disconnect();
+ jedis2.disconnect();
+
+ server1.stop();
+ server2.stop();
+ }
+
+ @Test
+ public void shouldReturnOOMError_forWriteOperations_whenThresholdReached() {
+ IgnoredException.addIgnoredException(expectedEx);
+ IgnoredException.addIgnoredException("LowMemoryException");
+
+ fillMemory(jedis1, MAX_ITERATION_COUNT, false);
+
+ assertThatThrownBy(() -> jedis2.set("oneMoreKey",
"value")).hasMessageContaining("OOM");
+ }
+
+ @Test
+ public void shouldAllowDeleteOperations_afterThresholdReached() {
+ IgnoredException.addIgnoredException(expectedEx);
+ IgnoredException.addIgnoredException("LowMemoryException");
+
+ fillMemory(jedis1, MAX_ITERATION_COUNT, false);
+
+ assertThatNoException().isThrownBy(() -> jedis2.del(FILLER_KEY + 1));
+ }
+
+ @Test
+ public void shouldAllowExpiration_afterThresholdReached() {
+ IgnoredException.addIgnoredException(expectedEx);
+ IgnoredException.addIgnoredException("LowMemoryException");
+
+ fillMemory(jedis1, MAX_ITERATION_COUNT, true);
+
+ GeodeAwaitility.await().until(() -> jedis2.ttl(FILLER_KEY + 1) == -2);
+ }
+
+ // TODO: test that write operations become allowed after memory has dropped
+ // below critical levels. Difficult to do right now because of vagaries of
the
+ // Java garbage collector.
+
+ private int fillMemory(Jedis jedis, int maxIterations, boolean
withExpiration) {
+ int i = 0;
+ while (i < maxIterations) {
+ try {
+ if (withExpiration) {
+ jedis.setex(FILLER_KEY + i, KEY_TTL_SECONDS, valueString);
+ } else {
+ jedis.set(FILLER_KEY + i, valueString);
+ }
+ } catch (JedisException je) {
+ assertThat(je).hasMessageContaining("OOM command not allowed");
+ break;
+ }
+ i++;
+ }
Review comment:
I added such a thread - maybe not entirely elegantly yet - and altered
fillMemory() in a couple ways. First, it does multiple forceGC() calls, to help
ensure that we're filling the memory with our Redis data. Secondly, it loops
multiple times with progressively smaller chunks of data, to help ensure every
nook and cranny is filled.
Haven't seen it fail YET, but I have to admit I'm still worried about
flakiness.
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> Implement Redis "noevict" policy for Geode Redis
> ------------------------------------------------
>
> Key: GEODE-8965
> URL: https://issues.apache.org/jira/browse/GEODE-8965
> Project: Geode
> Issue Type: New Feature
> Components: redis
> Reporter: Raymond Ingles
> Assignee: Raymond Ingles
> Priority: Major
> Labels: blocks-1.14.0, pull-request-available
>
> Redis supports the "noevict" eviction policy. When this is selected, Redis
> returns an OOM error when commands that consume new memory are attempted. New
> data cannot be written to the cache until either TTL expiration or explicit
> deletion of keys has freed enough memory to allow write operations again.
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