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These topics explain how to troubleshoot issues with ZooKeeper such as connection loss errors.
ZooKeeper connection loss errors
Sometimes the Edge components such as Message Processors and Management Servers may lose connectivity with ZooKeeper. This can lead to issues such as API Proxy deployment errors, Management API failures, and so on.
Playbooks
This section provides information and guidance on some specific procedures that can be followed for troubleshooting and resolving ZooKeeper connection loss errors.
| Problem | Error message in logs | Playbook |
|---|---|---|
| ZooKeeper connection loss errors |
You may see the following error in Router or Message Processor logs:
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
or You may see the following error while deploying API Proxy in Edge UI:
Error Fetching Deployments
Error while checking path existence for path: PATH
|
ZooKeeper Connection Loss Errors |
Diagnostic information
If you need assistance from Apigee Support on the ZooKeeper connection loss errors, then gather the following diagnostic information and share it in the support case:
| Diagnostic information | Location | How do I gather this information? |
|---|---|---|
| ZooKeeper health check commands | ZooKeeper |
echo "ruok" | nc localhost 2181 | tee /tmp/zookeeper_NODE#_ruok_$(hostname)-$(date +%Y.%m.%d_%H.%M.%S).txt echo srvr | nc localhost 2181 | tee /tmp/zookeeper_NODE#_srvr_$(hostname)-$(date +%Y.%m.%d_%H.%M.%S).txt echo mntr | nc localhost 2181 | tee /tmp/zookeeper_NODE#_mntr_$(hostname)-$(date +%Y.%m.%d_%H.%M.%S).txt echo stat | nc localhost 2181 | tee /tmp/zookeeper_NODE#_stat_$(hostname)-$(date +%Y.%m.%d_%H.%M.%S).txt echo cons | nc localhost 2181 | tee /tmp/zookeeper_NODE#_cons_$(hostname)-$(date +%Y.%m.%d_%H.%M.%S).txt |
| ZooKeeper logs and associated files | ZooKeeper | tar cvzf /tmp/zookeeper_logs_$(hostname)_$(date +%Y.%m.%d_%H.%M.%S).tar.gz /opt/apigee/var/log/apigee-zookeeper/*.log /opt/apigee/apigee-zookeeper/conf/zoo.cfg /opt/apigee/data/apigee-zookeeper/data/myid |
| Compress all the diagnostic data | ZooKeeper |
tar -cvzf /tmp/data_CASE#_$(hostname).tar.gz /tmp/zookeeper_* |