could not process input request on the Proton server, the input stream is down due to:invalid stream header: 504F5354 - fiware-orion

Question

I have deployed Proton and a docker image of Orion in the same Ubuntu server.
When Orion is sending events to Proton I'm getting the following failure
PM com.ibm.hrl.proton.server.adapter.eventHandlers.RequestHandler run
INFO: run: could not process input request on the Proton server, the input stream is down due to:invalid stream header: 504F5354
My server is running Ubuntu 14.04, tomcat7 and java 8
And the subscription sent to Orion to get events to Proton is the following
(curl 192.168.90.3:1026/v1/subscribeContext?notifyFormat=xml -s -S --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Fiware-Service: ct_stc' -d #- | python -mjson.tool) <<EOF
{
"entities": [
{
"type": "STCSensor",
"isPattern": "false",
"id": "605222424"
}
],
"reference": "http://192.168.90.3:3002/ProtonOnWebServer/rest/events",
"duration": "P1M",
"notifyConditions": [
{
"type": "ONCHANGE",
"condValues": [
"Serial",
"BatteryLevel",
"CurrentRSSI",
"LastPacketRSSI",
"LastPacketSNR",
"OzoneCal"
]
}
],
"throttling": "PT1S"
}
EOF
Adding POST similar to the one received by Proton
POST /test/xml.php HTTP/1.1" 200 168 "-" "orion/0.24.0-next libcurl/7.19.7
<notifyContextRequest>
<subscriptionId>56279a61e4ea5f2df9a9eebc</subscriptionId>
<originator>localhost</originator>
<contextResponseList>
<contextElementResponse>
<contextElement>
<entityId type="STCSensor" isPattern="false">
<id>605222424</id>
</entityId>
<contextAttributeList>
<contextAttribute>
<name>Altitude</name>
<type>integer</type>
<contextValue>720</contextValue>
</contextAttribute>
...
And logs in Orion
orion_1 | INFO#14:40:04 httpRequestSend.cpp[199]: Starting transaction to 192.168.90.3:3002/ProtonOnWebServer/rest/events
orion_1 | INFO#14:40:04 connectionOperations.cpp[307]: Database Operation Successful (insert: { _id: ObjectId('5627a3c4e4ea5f2df9a9eebe'), expiration: 1448030404, reference: "http://192.168.90.3:3002/ProtonOnWebServer/rest/events", throttling: 1, servicePath: "/#", entities: [ { id: "705222424", type: "STCSensor", isPattern: "false" } ], attrs: [], conditions: [ { type: "ONCHANGE", value: [ "Serial", "BatteryLevel", "CurrentRSSI", "LastPacketRSSI", "LastPacketSNR"] } ], lastNotification: 1445438404, count: 1, format: "XML" })
orion_1 | INFO#14:40:04 rest.cpp[467]: Transaction ended
orion_1 | WARNING#14:40:04 httpRequestSend.cpp[435]: Notification failure for 192.168.90.3:3002 (curl_easy_perform failed: Failure when receiving data from the peer)
orion_1 | INFO#14:40:04 httpRequestSend.cpp[452]: Transaction ended
Is anything wrong in the subscription?
Thanks for your help