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https://issues.apache.org/jira/browse/CAMEL-20948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Grzegorz Grzybek resolved CAMEL-20948.
--------------------------------------
Resolution: Fixed
> camel-util-json doesn't handle streaming correctly
> --------------------------------------------------
>
> Key: CAMEL-20948
> URL: https://issues.apache.org/jira/browse/CAMEL-20948
> Project: Camel
> Issue Type: Improvement
> Components: tooling
> Affects Versions: 4.7.0
> Reporter: Grzegorz Grzybek
> Assignee: Grzegorz Grzybek
> Priority: Major
> Fix For: 4.7.0
>
>
> I was checking Jolokia with different JSON libraries:
> * https://github.com/jolokia/jolokia/issues/686
> * https://github.com/jolokia/jolokia/issues/252
> and I decided to check [~davsclaus]
> [suggestion|https://github.com/jolokia/jolokia/issues/686#issuecomment-2151669446].
> I am using Artemis instance with Hawtio 4, Jolokia 2 and different JSON
> libraries. I have 10K queues (which means 20K MBeans for the queues alone)
> and I check Jolokia {{list()}} operation. Initially I got:
> {noformat}
> java.lang.OutOfMemoryError: Java heap space
> at java.base/java.util.Arrays.copyOf(Arrays.java:3537) ~[?:?]
> at
> java.base/java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:228)
> ~[?:?]
> at
> java.base/java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:802)
> ~[?:?]
> at java.base/java.lang.StringBuffer.append(StringBuffer.java:425) ~[?:?]
> at java.base/java.io.StringWriter.write(StringWriter.java:77) ~[?:?]
> at org.apache.camel.util.json.JsonObject.toJson(JsonObject.java:768)
> ~[?:?]
> at org.apache.camel.util.json.JsonObject.toJson(JsonObject.java:747)
> ~[?:?]
> at org.apache.camel.util.json.Jsoner.serialize(Jsoner.java:946) ~[?:?]
> at org.apache.camel.util.json.Jsoner.serialize(Jsoner.java:924) ~[?:?]
> at org.apache.camel.util.json.JsonObject.toJson(JsonObject.java:773)
> ~[?:?]
> at
> org.jolokia.server.core.util.IoUtil.streamResponseAndClose(IoUtil.java:33)
> ~[?:?]
> at
> org.jolokia.server.core.http.AgentServlet.sendStreamingResponse(AgentServlet.java:575)
> ~[?:?]
> at
> org.jolokia.server.core.http.AgentServlet.sendResponse(AgentServlet.java:558)
> ~[?:?]
> at
> org.jolokia.server.core.http.AgentServlet.handle(AgentServlet.java:359) ~[?:?]
> at
> org.jolokia.server.core.http.AgentServlet.doPost(AgentServlet.java:298) ~[?:?]
> at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:520)
> ~[jakarta.servlet-api-5.0.0.jar:5.0.0]
> at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:587)
> ~[jakarta.servlet-api-5.0.0.jar:5.0.0]
> at
> org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1419)
> ~[jetty-servlet-11.0.18.jar:11.0.18]
> ...
> {noformat}
> but I quickly realized there's a problem about String / Writer handling in
> camel-util-json. PR pending.
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