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StorageService read threshold get methods throw NullPointerException …
…due to not handling null configs patch by David Capwell; reviewed by Berenguer Blasi for CASSANDRA-17593
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David Capwell
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May 10, 2022
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/* | ||
* 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.cassandra.distributed.test.jmx; | ||
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import java.net.InetAddress; | ||
import java.util.ArrayList; | ||
import java.util.Collections; | ||
import java.util.List; | ||
import java.util.Set; | ||
import java.util.TreeSet; | ||
import javax.management.JMRuntimeException; | ||
import javax.management.MBeanAttributeInfo; | ||
import javax.management.MBeanInfo; | ||
import javax.management.MBeanOperationInfo; | ||
import javax.management.MBeanServerConnection; | ||
import javax.management.ObjectName; | ||
import javax.management.remote.JMXConnector; | ||
import javax.management.remote.JMXConnectorFactory; | ||
import javax.management.remote.JMXConnectorServer; | ||
import javax.management.remote.JMXServiceURL; | ||
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import com.google.common.collect.ImmutableSet; | ||
import org.junit.Test; | ||
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import org.apache.cassandra.distributed.Cluster; | ||
import org.apache.cassandra.distributed.api.Feature; | ||
import org.apache.cassandra.distributed.test.TestBaseImpl; | ||
import org.apache.cassandra.utils.JMXServerUtils; | ||
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import static org.apache.cassandra.config.CassandraRelevantProperties.IS_DISABLED_MBEAN_REGISTRATION; | ||
import static org.apache.cassandra.cql3.CQLTester.getAutomaticallyAllocatedPort; | ||
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public class JMXGetterCheckTest extends TestBaseImpl | ||
{ | ||
private static final Set<String> IGNORE_ATTRIBUTES = ImmutableSet.of( | ||
"org.apache.cassandra.net:type=MessagingService:BackPressurePerHost" // throws unsupported saying the feature was removed... dropped in CASSANDRA-15375 | ||
); | ||
private static final Set<String> IGNORE_OPERATIONS = ImmutableSet.of( | ||
"org.apache.cassandra.db:type=StorageService:stopDaemon", // halts the instance, which then causes the JVM to exit | ||
"org.apache.cassandra.db:type=StorageService:drain", // don't drain, it stops things which can cause other APIs to be unstable as we are in a stopped state | ||
"org.apache.cassandra.db:type=StorageService:stopGossiping" // if we stop gossip this can causes other issues, so avoid | ||
); | ||
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@Test | ||
public void test() throws Exception | ||
{ | ||
// start JMX server, which the instance will register with | ||
InetAddress loopback = InetAddress.getLoopbackAddress(); | ||
String jmxHost = loopback.getHostAddress(); | ||
int jmxPort = getAutomaticallyAllocatedPort(loopback); | ||
JMXConnectorServer jmxServer = JMXServerUtils.createJMXServer(jmxPort, true); | ||
jmxServer.start(); | ||
String url = "service:jmx:rmi:///jndi/rmi://" + jmxHost + ":" + jmxPort + "/jmxrmi"; | ||
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IS_DISABLED_MBEAN_REGISTRATION.setBoolean(false); | ||
try (Cluster cluster = Cluster.build(1).withConfig(c -> c.with(Feature.values())).start()) | ||
{ | ||
List<Named> errors = new ArrayList<>(); | ||
try (JMXConnector jmxc = JMXConnectorFactory.connect(new JMXServiceURL(url), null)) | ||
{ | ||
MBeanServerConnection mbsc = jmxc.getMBeanServerConnection(); | ||
Set<ObjectName> metricNames = new TreeSet<>(mbsc.queryNames(null, null)); | ||
for (ObjectName name : metricNames) | ||
{ | ||
if (!name.getDomain().startsWith("org.apache.cassandra")) | ||
continue; | ||
MBeanInfo info = mbsc.getMBeanInfo(name); | ||
for (MBeanAttributeInfo a : info.getAttributes()) | ||
{ | ||
String fqn = String.format("%s:%s", name, a.getName()); | ||
if (!a.isReadable() || IGNORE_ATTRIBUTES.contains(fqn)) | ||
continue; | ||
try | ||
{ | ||
mbsc.getAttribute(name, a.getName()); | ||
} | ||
catch (JMRuntimeException e) | ||
{ | ||
errors.add(new Named(String.format("Attribute %s", fqn), e.getCause())); | ||
} | ||
} | ||
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for (MBeanOperationInfo o : info.getOperations()) | ||
{ | ||
String fqn = String.format("%s:%s", name, o.getName()); | ||
if (o.getSignature().length != 0 || IGNORE_OPERATIONS.contains(fqn)) | ||
continue; | ||
try | ||
{ | ||
mbsc.invoke(name, o.getName(), new Object[0], new String[0]); | ||
} | ||
catch (JMRuntimeException e) | ||
{ | ||
errors.add(new Named(String.format("Operation %s", fqn), e.getCause())); | ||
} | ||
} | ||
} | ||
} | ||
if (!errors.isEmpty()) | ||
{ | ||
AssertionError root = new AssertionError(); | ||
errors.forEach(root::addSuppressed); | ||
throw root; | ||
} | ||
} | ||
} | ||
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/** | ||
* This class is meant to make new errors easier to read, by adding the JMX endpoint, and cleaning up the unneded JMX/Reflection logic cluttering the stacktrace | ||
*/ | ||
private static class Named extends RuntimeException | ||
{ | ||
public Named(String msg, Throwable cause) | ||
{ | ||
super(msg + "\nCaused by: " + cause.getClass().getCanonicalName() + ": " + cause.getMessage(), cause.getCause()); | ||
StackTraceElement[] stack = cause.getStackTrace(); | ||
List<StackTraceElement> copy = new ArrayList<>(); | ||
for (StackTraceElement s : stack) | ||
{ | ||
if (!s.getClassName().startsWith("org.apache.cassandra")) | ||
break; | ||
copy.add(s); | ||
} | ||
Collections.reverse(copy); | ||
setStackTrace(copy.toArray(new StackTraceElement[0])); | ||
} | ||
} | ||
} |
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