ZookeeperRoutePolicy with multiple routes and different znodes- one always shuts down

I have two routes that I integrated with ZooKeeperRoutePolicy to establish basic distributed route election.
(Using camel 2.13.1)

When used with one route instance, election/failover works fine.
When I set up multiple routes with multiple instances of ZooKeeperRoutePolicy, one route almost always gets immediately shut down but NOT 100% of the time.
The behavior seems nondeterministic- like a race condition.

Each RouteBuilder instance has a separate instance of a ZooKeeperRoutePolicy that uses the same server but a different zookeeper znode:
Like this:
Route 1: zookeeper URI: localhost:2181/scheduler-node-election/test
Route 2: zookeeper URI: localhost:2181/scheduler-node-election/googleplay

In the zookeeper CLI:
[zk: localhost:2181(CONNECTED) 6] ls /scheduler-node-election
[googleplay, test]

(I have one zookeeper node running)

I’m seeing that most of the time one route (either one) just gets shutdown during Spring initialization, while the other one runs. But once in a while, both routes will run.
In this case the “googleplay” route is shut down and the associated session is closed.

Here’s the Camel/Zookeeper logging:
[timer://test-#2] org.apache.zookeeper.ZooKeeper : Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=5000 watcher=org.apache.camel.component.zookeeper.ConnectionHolder [ at ] 733ed393
[//googleplay-#1] org.apache.zookeeper.ZooKeeper : Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=5000 watcher=org.apache.camel.component.zookeeper.ConnectionHolder [ at ] 21b49301
[127.0.0.1:2181)] org.apache.zookeeper.ClientCnxn : Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
[127.0.0.1:2181)] org.apache.zookeeper.ClientCnxn : Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
[127.0.0.1:2181)] org.apache.zookeeper.ClientCnxn : Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
[127.0.0.1:2181)] org.apache.zookeeper.ClientCnxn : Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
[127.0.0.1:2181)] org.apache.zookeeper.ClientCnxn : Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x146de3b813e0032, negotiated timeout = 5000
[127.0.0.1:2181)] org.apache.zookeeper.ClientCnxn : Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x146de3b813e0031, negotiated timeout = 5000
[timer://test-#2] o.a.c.c.zookeeper.ZookeeperProducer : Node '/scheduler-node-election/test/localhost-3fae9f79-a91c-4baa-bdcc-bd23a2623690' did not exist, creating it.
[//googleplay-#1] o.a.c.c.zookeeper.ZookeeperProducer : Node '/scheduler-node-election/googleplay/localhost-2b2634e5-a0b3-4c0f-8ddb-b44e008854db' did not exist, creating it.
[timer://test-#2] o.a.c.c.z.policy.ZooKeeperElection : Candidate node '/scheduler-node-election/test/localhost-3fae9f79-a91c-4baa-bdcc-bd23a2623690' has been created
[//googleplay-#1] o.a.c.c.z.policy.ZooKeeperElection : Candidate node '/scheduler-node-election/googleplay/localhost-2b2634e5-a0b3-4c0f-8ddb-b44e008854db' has been created
[//googleplay-#1] o.a.camel.spring.SpringCamelContext : Route: election-route-localhos started and consuming from: Endpoint[zookeeper://127.0.0.1:2181/scheduler-node-election/googleplay]
[timer://test-#2] o.a.camel.impl.DefaultShutdownStrategy : Starting to graceful shutdown 1 routes (timeout 300 seconds)
[ShutdownTask-#4] o.a.camel.impl.DefaultShutdownStrategy : Route: election-route-localhos shutdown complete, was consuming from: Endpoint[zookeeper://127.0.0.1:2181/scheduler-node-election/googleplay]
[timer://test-#2] o.a.camel.impl.DefaultShutdownStrategy : Graceful shutdown of 1 routes completed in 0 seconds
[timer://test-#2] o.a.camel.spring.SpringCamelContext : Route: election-route-localhos is stopped, was consuming from: Endpoint[zookeeper://127.0.0.1:2181/scheduler-node-election/googleplay]
[-#1-EventThread] org.apache.zookeeper.ClientCnxn : EventThread shut down
[timer://test-#2] org.apache.zookeeper.ZooKeeper : Session: 0x146de3b813e0031 closed
[timer://test-#2] o.a.camel.spring.SpringCamelContext : Route: election-route-localhos is shutdown and removed, was consuming from: Endpoint[zookeeper://127.0.0.1:2181/scheduler-node-election/googleplay]
[timer://test-#2] o.a.camel.spring.SpringCamelContext : Route: election-route-localhos started and consuming from: Endpoint[zookeeper://127.0.0.1:2181/scheduler-node-election/test]

My route builder code is below. I call it twice, once for vendor = “test”, and once for vendor = “googleplay”.

private RouteBuilder scheduledEventBatchExecutionTimerRoute(
final String vendor,
final int batchSize,
final int timerPeriodSeconds,
final boolean autoStart) {

log.info("scheduledEventBatchExecutionTimerRoute: vendor={}, doStart={}, queryInterval={}s, batchSize={}",
vendor, autoStart, timerPeriodSeconds, batchSize);

return new RouteBuilder() {
@Override
public void configure() throws Exception {

from("timer://" + vendor + "?period=" + timerPeriodSeconds + "s")
.autoStartup(autoStart)
.routePolicy(electionRoutePolicy(vendor))
.setHeader("vendor", constant(vendor)).setHeader("batchSize", constant(batchSize))
.beanRef("scheduleEventRepository", "findExecutableEvents(entitlement.create.${in.header.vendor}, ${in.header.batchSize})")

.choice()
.when().simple("${body.size} == 0")
.log(LoggingLevel.DEBUG, "Route: vendor=${in.header.vendor}: No items to process")
.when().simple("${body.size} > 0")
.to(ROUTE_DIRECT_EVENT_BATCH_EXECUTION + "-" + vendor)

.endChoice()
.routeId(vendor + "-timer-execution-route");

};

private RoutePolicy electionRoutePolicy(String vendor) {

RoutePolicy routePolicy;

if (doUseDistributedRouteElection) {
log.info("Creating zookeeper distributed route election policy for {}", vendor);
// Ensure that only one node is processing work for the specified vendor.
// See http://camel.apache.org/zookeeper.html - distributed route policy.
routePolicy = new ZooKeeperRoutePolicy(zookeeperUri + "scheduler-node-election/" + vendor, 1);

} else {
// Just return a default route policy that does nothing.
log.info("No-op route policy for {}", vendor);
routePolicy = new RoutePolicySupport() {
@Override
public void onInit(Route route) {
super.onInit(route);

};

return routePolicy;