Elastisearch Failed to JSON encode issue - php

Question

I working on elastic search and I have 1K phone numbers when I pass this phone numbers array to elastic search to search users through phone numbers it gives me exception
Failed to JSON encode /var/app/current/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Serializers/SmartSerializer.php
Below is my Elasticsearch client initializing
$client = ClientBuilder::create()->setHosts([$host])->build();
And my working query in Elasticsearch
{
"_source": [
"id"
],
"query": {
"bool": {
"must": [
{
"term": {
"type": "user"
}
},
{
"bool": {
"should": [
{
"prefix": {
"phone": {
"value": "923047698099"
}
}
},
{
"prefix": {
"phone": {
"value": "92313730320"
}
}
},
.
.
.
]
}
}
],
"must_not": [
{
"has_child": {
"type": "blocked",
"query": {
"term": {
"user_id": "u-2"
}
}
}
},
{
"has_child": {
"type": "block",
"query": {
"term": {
"user_id": "u-2"
}
}
}
},
{
"term": {
"db_id": 2
}
}
]
}
}
}
I don't know that where I doing mistake. Either at client initializing or writing elasticserch query. I searched this issue but not usefull solution found or might be I did't understand clearly. But still I am stucked on this issue that how to solve this problem. Suggest any usefull link or solution.
Thanks