Enrich Mediatior throwing json malformed Error - wso2

Question

Enrich mediator in WSO2 always fails with a json malformed expection from the JSONUtil class of synapse-commons
JSON : {"Topic":"demo","MessageKey":"demo","Header":{"continuum.message.dc.timestamp":["2020-08-06 00:10:14.866313839 +0000 UTC"],"continuum.message.transaction.id":["34ee58ae-288b-4338-bcbc-8971beadebbb"],"continuum.message.source":["demo"],"continuum.message.target":["demo"]},"Message":[{"backupServerName":"","billableSpace":"","client":{"id":1},"cpuSpeed":"","deviceID":"123","deviceName":"MSMA","deviceType":"backups","failedBackupCount":0,"friendlyName":"Ubuntu Server","installationDate":null,"ipAddress":"","isActive":false,"lastSuccessfulBackup":"2018-12-05T05:59:28.83Z","localHardDrives":"","manufacturer":"","modelNumber":"","numberOfProcessors":0,"osName":"","osVersion":"","partnerID":123,"physicalMemory":"","protectedDeviceName":"","psaRoleType":"","purchaseDate":null,"serialNumber":"","successfulBackupCount":0},{"backupServerName":"","billableSpace":"","client":{"id":123},"cpuSpeed":"","deviceID":"123","deviceName":"MSMA","deviceType":"backups","failedBackupCount":0,"friendlyName":"Ubuntu Server","installationDate":null,"ipAddress":"","isActive":false,"lastSuccessfulBackup":"2018-12-05T05:59:28.83Z","localHardDrives":"","manufacturer":"","modelNumber":"","numberOfProcessors":0,"osName":"","osVersion":"","partnerID":123,"physicalMemory":"","protectedDeviceName":"","psaRoleType":"","purchaseDate":null,"serialNumber":"","successfulBackupCount":0},{"backupServerName":"","billableSpace":"","client":{"id":123},"cpuSpeed":"","deviceID":"123","deviceName":"MSMA","deviceType":"backups","failedBackupCount":0,"friendlyName":"Ubuntu Server","installationDate":null,"ipAddress":"","isActive":false,"lastSuccessfulBackup":"2018-12-05T05:59:28.83Z","localHardDrives":"","manufacturer":"","modelNumber":"","numberOfProcessors":0,"osName":"","osVersion":"","partnerID":123,"physicalMemory":"","protectedDeviceName":"","psaRoleType":"","purchaseDate":null,"serialNumber":"","successfulBackupCount":0}]}
Enrich Code in Sequence:
<property name="messageType" scope="axis2" type="STRING" value="application/json"/>
<enrich>
<source clone="false" property="OriginalMessage" type="property"/>
<target type="body"/>
</enrich>
Stack Trace:[2020-08-06 20:12:56,974] [-1234] [] [Thread-35] ERROR {org.apache.synapse.mediators.filters.FilterMediator} - Existing json payload is malformed. MessageID : ID:RMM-LT-998-65522-1596608596560-4:9:1:1:3 org.apache.synapse.commons.SynapseCommonsException: Existing json payload is malformed. MessageID : ID:RMM-LT-998-65522-1596608596560-4:9:1:1:3 at org.apache.synapse.commons.json.JsonUtil.removeChildrenFromPayloadBody(JsonUtil.java:701) at org.apache.synapse.commons.json.JsonUtil.getNewJsonPayload(JsonUtil.java:675) at org.apache.synapse.commons.json.JsonUtil.getNewJsonPayload(JsonUtil.java:787) at org.apache.synapse.mediators.elementary.Target.insertJson(Target.java:399) at org.apache.synapse.mediators.elementary.EnrichMediator.mediate(EnrichMediator.java:148) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.mediators.filters.FilterMediator.mediate(FilterMediator.java:169) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158) at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:214) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.config.xml.AnonymousListMediator.mediate(AnonymousListMediator.java:37) at org.apache.synapse.config.xml.SwitchCase.mediate(SwitchCase.java:69) at org.apache.synapse.mediators.filters.SwitchMediator.mediate(SwitchMediator.java:134) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158) at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:214) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.config.xml.AnonymousListMediator.mediate(AnonymousListMediator.java:37) at org.apache.synapse.config.xml.SwitchCase.mediate(SwitchCase.java:69) at org.apache.synapse.mediators.filters.SwitchMediator.mediate(SwitchMediator.java:134) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158) at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectInbound(Axis2SynapseEnvironment.java:467) at org.wso2.carbon.inbound.endpoint.protocol.jms.JMSInjectHandler.invoke(JMSInjectHandler.java:255) at org.wso2.carbon.inbound.endpoint.protocol.jms.JMSPollingConsumer.poll(JMSPollingConsumer.java:297) at org.wso2.carbon.inbound.endpoint.protocol.jms.JMSPollingConsumer.execute(JMSPollingConsumer.java:204) at org.wso2.carbon.inbound.endpoint.protocol.jms.JMSTask.taskExecute(JMSTask.java:47) at org.wso2.carbon.inbound.endpoint.common.InboundRunner.run(InboundRunner.java:108) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NullPointerException at org.apache.axiom.om.impl.llom.OMSourcedElementImpl.getDirectReader(OMSourcedElementImpl.java:224) at org.apache.axiom.om.impl.llom.OMSourcedElementImpl.forceExpand(OMSourcedElementImpl.java:253) at org.apache.axiom.om.impl.llom.OMSourcedElementImpl.getChildren(OMSourcedElementImpl.java:862) at org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:458) at org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:466) at org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:466) at org.apache.synapse.commons.json.JsonUtil.removeChildrenFromPayloadBody(JsonUtil.java:696) ... 35 more

Answer 1

I have used the following proxy service to try and reproduce the issue that you have observed. Here I am sending the JSON payload you have attached in the description to the proxy service. The JSON payload is then stored in the property OriginalMessage. Then a backend is invoked. After invoking the backend using the enrich mediator the original payload is then enriched to the body.
<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
name="sampleProxy"
startOnLoad="true"
statistics="disable"
trace="disable"
transports="http,https">
<target>
<inSequence>
<log>
<property expression="json-eval($)" name="OriginalMessage"/>
</log>
<property expression="json-eval($)" name="OriginalMessage"/>
<call>
<endpoint>
<address uri="http://localhost:8280/services/file_upload"/>
</endpoint>
</call>
<log level="full"/>
<property name="messageType"
scope="axis2"
type="STRING"
value="application/json"/>
<enrich>
<source clone="false" property="OriginalMessage" type="property"/>
<target type="body"/>
</enrich>
<respond/>
</inSequence>
</target>
<description/>
</proxy>
Here I could not observe any issue with this mediation. This was working as expected.
What is the EI version that you are using?
How did you store the JSON payload to the property mediator?