# Divide by Zero Error upgrading a deployment **URL:** \ **Category:** Elastic Cloud Enterprise (ECE)\ **Created:** [June 20, 2019, 12:52pm UTC](https://discuss.elastic.co/t/divide-by-zero-error-upgrading-a-deployment/186688 "2019-06-20T12:52:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![JamesNotJamez](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jamesnotjamez/32/45736_2.png) [@JamesNotJamez](https://discuss.elastic.co/u/JamesNotJamez)\ **Post date:** [June 20, 2019, 12:52pm UTC](https://discuss.elastic.co/t/divide-by-zero-error-upgrading-a-deployment/186688/1 "2019-06-20T12:52:24Z")
Hi, I'm getting the following error when upgrading a deployment (version 6.5.4 to 6.7.2 on ECE 2.2.2) ```auto Unexpected error during step: [rolling-upgrade]: [java.lang.ArithmeticException: / by zero] ``` Any idea why this error may be occouring. When I look in the logs (logging and metrics logs) the deployment has no errors. Here's the plan I'm applying ```auto { "tiebreaker_topology": { "memory_per_node": 1024 }, "elasticsearch": { "version": "6.7.2", "system_settings": { "use_disk_threshold": true }, "user_settings_yaml": "redacted" }, "transient": { "strategy": { "grow_and_shrink": {} }, "plan_configuration": { "preferred_allocators": [], "max_snapshot_attempts": 3, "move_allocators": [], "skip_snapshot": false, "move_instances": [], "skip_post_upgrade_steps": false, "extended_maintenance": false, "skip_upgrade_checker": false, "override_failsafe": false, "skip_data_migration": false, "calm_wait_time": 5, "reallocate_instances": false, "timeout": 4096, "max_snapshot_age": 300, "move_only": false } }, "cluster_topology": [ { "memory_per_node": 1024, "node_type": { "master": true, "data": true, "ingest": false, "ml": false }, "instance_configuration_id": "9c6147389f7d45d6b19c2e93f852cd49", "elasticsearch": { "system_settings": { "enable_close_index": false, "use_disk_threshold": true, "monitoring_collection_interval": -1, "monitoring_history_duration": "7d", "destructive_requires_name": false, "reindex_whitelist": [], "auto_create_index": true, "scripting": { "stored": { "enabled": true }, "inline": { "enabled": true } }, "http": { "compression": true, "cors_enabled": false, "cors_max_age": 1728000, "cors_allow_credentials": false } }, "user_settings_yaml": " redacted " }, "zone_count": 1, "node_count_per_zone": 1 }, { "size": { "value": 0, "resource": "memory" }, "node_type": { "master": true, "data": true, "ingest": true, "ml": false }, "instance_configuration_id": "data.default", "elasticsearch": { "system_settings": { "enable_close_index": false, "use_disk_threshold": true, "monitoring_collection_interval": -1, "monitoring_history_duration": "7d", "destructive_requires_name": false, "reindex_whitelist": [], "auto_create_index": true, "scripting": { "stored": { "enabled": true }, "inline": { "enabled": true } }, "http": { "compression": true, "cors_enabled": false, "cors_max_age": 1728000, "cors_allow_credentials": false } }, "user_settings_yaml": " redacted " }, "zone_count": 1 }, { "size": { "value": 0, "resource": "memory" }, "node_type": { "master": true, "data": false, "ingest": false, "ml": false }, "instance_configuration_id": "master", "elasticsearch": { "system_settings": { "enable_close_index": false, "use_disk_threshold": true, "monitoring_collection_interval": -1, "monitoring_history_duration": "7d", "destructive_requires_name": false, "reindex_whitelist": [], "auto_create_index": true, "scripting": { "stored": { "enabled": true }, "inline": { "enabled": true } }, "http": { "compression": true, "cors_enabled": false, "cors_max_age": 1728000, "cors_allow_credentials": false } }, "user_settings_yaml": " redacted " }, "zone_count": 1 }, { "size": { "value": 0, "resource": "memory" }, "node_type": { "master": false, "data": false, "ingest": false, "ml": true }, "instance_configuration_id": "ml", "elasticsearch": { "system_settings": { "enable_close_index": false, "use_disk_threshold": true, "monitoring_collection_interval": -1, "monitoring_history_duration": "7d", "destructive_requires_name": false, "reindex_whitelist": [], "auto_create_index": true, "scripting": { "stored": { "enabled": true }, "inline": { "enabled": true } }, "http": { "compression": true, "cors_enabled": false, "cors_max_age": 1728000, "cors_allow_credentials": false } }, "user_settings_yaml": " redacted " }, "zone_count": 1 } ], "deployment_template": { "id": "default" } } ``` Many thanks ---
**Author:** ![Alex\_Piggott](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alex_piggott/32/11053_2.png) [@Alex\_Piggott](https://discuss.elastic.co/u/Alex_Piggott)\ **Post date:** [July 1, 2019, 2:26pm UTC](https://discuss.elastic.co/t/divide-by-zero-error-upgrading-a-deployment/186688/2 "2019-07-01T14:26:44Z")
That's an interesting one! I had a look around and couldn't see where that could be happening. The error you'd see would be in the `service-constructor` index in the L+M - can you have a look around the right timestamp to see if anything is in there? The only oddity with the plan is that the data topology element is using `node_count_per_zone`/`memory_per_node` whereas the others (empty ones) are using `size` Maybe try replacing those 2 fields with: ```auto "size": { "value": 1024, "resource": "memory" }, ``` but that's a big guess. There should be an exception in the constructor logs (or even possibly in the activity page for that cluster under details), which will tell us what's actually happening Alex ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 15, 2019, 2:26pm UTC](https://discuss.elastic.co/t/divide-by-zero-error-upgrading-a-deployment/186688/3 "2019-07-15T14:26:47Z")
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