https://jira.opendaylight.org This file is an XML representation of an issue en-us 8.20.10 820010 22-06-2022 https://jira.opendaylight.org/browse/OVSDB-471 ovsdb <p>I'm looking at a Java Flight Recording obtained from (internal) scale lab testing, and see extensive "TLAB Allocations" due to what appears to be something wrong in ovsdb's JSON processing:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"><span class="code-object">char</span>[] java.util.Arrays.copyOfRange(<span class="code-object">char</span>[], <span class="code-object">int</span>, <span class="code-object">int</span>) 2671 void java.lang.<span class="code-object">String</span>.&lt;init&gt;(<span class="code-object">char</span>[], <span class="code-object">int</span>, <span class="code-object">int</span>) 2671 <span class="code-object">String</span> java.lang.StringBuilder.toString() 2145 <span class="code-object">String</span> sun.reflect.generics.parser.SignatureParser.parseIdentifier() 812 SimpleClassTypeSignature sun.reflect.generics.parser.SignatureParser.parsePackageNameAndSimpleClassTypeSignature() 692 ClassTypeSignature sun.reflect.generics.parser.SignatureParser.parseClassTypeSignature() 692 FieldTypeSignature sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature(<span class="code-object">boolean</span>) 692 FieldTypeSignature sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature() 692 TypeArgument sun.reflect.generics.parser.SignatureParser.parseTypeArgument() 370 TypeArgument[] sun.reflect.generics.parser.SignatureParser.parseTypeArguments() 370 SimpleClassTypeSignature sun.reflect.generics.parser.SignatureParser.parsePackageNameAndSimpleClassTypeSignature() 370 ClassTypeSignature sun.reflect.generics.parser.SignatureParser.parseClassTypeSignature() 370 FieldTypeSignature sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature(<span class="code-object">boolean</span>) 370 FieldTypeSignature sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature() 370 TypeSignature sun.reflect.generics.parser.SignatureParser.parseTypeSignature() 370 TypeSignature sun.reflect.generics.parser.SignatureParser.parseTypeSig(<span class="code-object">String</span>) 309 TypeSignature sun.reflect.generics.repository.FieldRepository.parse(<span class="code-object">String</span>) 309 Tree sun.reflect.generics.repository.FieldRepository.parse(<span class="code-object">String</span>) 309 void sun.reflect.generics.repository.AbstractRepository.&lt;init&gt;(<span class="code-object">String</span>, GenericsFactory) 309 void sun.reflect.generics.repository.FieldRepository.&lt;init&gt;(<span class="code-object">String</span>, GenericsFactory) 309 FieldRepository sun.reflect.generics.repository.FieldRepository.make(<span class="code-object">String</span>, GenericsFactory) 309 FieldRepository java.lang.reflect.Field.getGenericInfo() 309 Type java.lang.reflect.Field.getGenericType() 309 JavaType com.fasterxml.jackson.databind.introspect.AnnotatedField.getType() 309 void com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.addBeanProps(DeserializationContext, BeanDescription, BeanDeserializerBuilder) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(DeserializationContext, JavaType, BeanDescription) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(DeserializationContext, JavaType, BeanDescription) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializationContext, DeserializerFactory, JavaType, BeanDescription) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializationContext, DeserializerFactory, JavaType) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializationContext, DeserializerFactory, JavaType) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 309 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 309 JsonDeserializer com.fasterxml.jackson.databind.DeserializationContext.findNonContextualValueDeserializer(JavaType) 306 void com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(DeserializationContext) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(JavaType, BeanProperty) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.std.MapDeserializer.createContextual(DeserializationContext, BeanProperty) 306 JsonDeserializer com.fasterxml.jackson.databind.DeserializationContext.handlePrimaryContextualization(JsonDeserializer, BeanProperty, JavaType) 306 void com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(DeserializationContext) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(JavaType, BeanProperty) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.std.MapDeserializer.createContextual(DeserializationContext, BeanProperty) 306 JsonDeserializer com.fasterxml.jackson.databind.DeserializationContext.handlePrimaryContextualization(JsonDeserializer, BeanProperty, JavaType) 306 void com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(DeserializationContext) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializationContext, DeserializerFactory, JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(JavaType) 306 JsonDeserializer com.fasterxml.jackson.databind.ObjectMapper._findRootDeserializer(DeserializationContext, JavaType) 306 <span class="code-object">Object</span> com.fasterxml.jackson.databind.ObjectMapper._convert(<span class="code-object">Object</span>, JavaType) 306 <span class="code-object">Object</span> com.fasterxml.jackson.databind.ObjectMapper.convertValue(<span class="code-object">Object</span>, <span class="code-object">Class</span>) 306 UpdateNotification org.opendaylight.ovsdb.lib.notation.json.Converter$UpdateNotificationDeser.deserialize(JsonNode) 306 UpdateNotification org.opendaylight.ovsdb.lib.notation.json.Converter$UpdateNotificationConverter.convert(JsonNode) 306 <span class="code-object">Object</span> org.opendaylight.ovsdb.lib.notation.json.Converter$UpdateNotificationConverter.convert(<span class="code-object">Object</span>) 306 <span class="code-object">Object</span> com.fasterxml.jackson.databind.deser.std.StdDelegatingDeserializer.convertValue(<span class="code-object">Object</span>) 306 <span class="code-object">Object</span> com.fasterxml.jackson.databind.deser.std.StdDelegatingDeserializer.deserialize(JsonParser, DeserializationContext) 306 <span class="code-object">Object</span> com.fasterxml.jackson.databind.ObjectMapper._convert(<span class="code-object">Object</span>, JavaType) 306 <span class="code-object">Object</span> com.fasterxml.jackson.databind.ObjectMapper.convertValue(<span class="code-object">Object</span>, <span class="code-object">Class</span>) 306 void org.opendaylight.ovsdb.lib.jsonrpc.JsonRpcEndpoint.processRequest(<span class="code-object">Object</span>, JsonNode) 306 void org.opendaylight.ovsdb.lib.jsonrpc.JsonRpcServiceBinderHandler.channelRead(ChannelHandlerContext, <span class="code-object">Object</span>) 306</pre> </div></div> OVSDB-471

Excessive memory allocation ("object churn") in OVSDB's Jackson based JSON processing

Bug Low Resolved Won't Do Vishal Thapar Michael Vorburger Mon, 12 Nov 2018 17:33:02 +0000 Fri, 16 Nov 2018 15:14:09 +0000 Fri, 16 Nov 2018 15:14:09 +0000 Oxygen-SR3 Oxygen-SR4 Fluorine-SR2 Neon 0 2 <p>The JFR results don’t necessarily support the diagnosis given here; in particular</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> <span class="code-object">char</span>[] java.util.Arrays.copyOfRange(<span class="code-object">char</span>[], <span class="code-object">int</span>, <span class="code-object">int</span>) 2671 void java.lang.<span class="code-object">String</span>.&lt;init&gt;(<span class="code-object">char</span>[], <span class="code-object">int</span>, <span class="code-object">int</span>) 2671 <span class="code-object">String</span> java.lang.StringBuilder.toString() 2145 <span class="code-object">String</span> sun.reflect.generics.parser.SignatureParser.parseIdentifier() 812 </pre> </div></div> <p>since one call to parseIdentifier() only ever results in one call to StringBuilder.toString().</p> <p>The JFR stack trace pinpoints majority contributors at each level: the above trace means that there were 2671 calls to copyOfRange(); the most common caller was String’s constructor (in 2671 cases, so in all cases here); the most common caller of the constructor was StringBuilder.toString(), in 2145 cases; the most common caller of StringBuilder.toString() was parseIdentifier(), in 812 cases. That leaves 1859 unexplained calls to copyOfRange().</p> <h3><a name="fuhgeddaboudit"></a>fuhgeddaboudit</h3> Development Rank 0|i03kbr: