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https://reviews.apache.org/r/58218/
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Review request for Ambari, Alejandro Fernandez, Nate Cole, Robert Levas, and
Sid Wagle.
Bugs: AMBARI-20685
https://issues.apache.org/jira/browse/AMBARI-20685
Repository: ambari
Description
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Large rolling upgrades (1000 hosts with 10,000 host components) creates a
massive request object object with 10's of 1000's of stages and tasks. The web
client executes a {{GET}} command against the API to retrieve upgrade
groups/items. On a large upgrade, this causes the EclipseLink SQL generation
code to run out of stack frame space while recursively building a query. To
work around this, the stack frame size per thread can be increased using
{{-Xss}} along with a value like 32M.
{code}
http://localhost:8080/api/v1/clusters/c1/upgrades/12?
upgrade_groups/UpgradeGroup/status!=PENDING&
fields=
Upgrade/progress_percent,
Upgrade/request_context,
Upgrade/request_status,
Upgrade/direction,
Upgrade/downgrade_allowed,
upgrade_groups/UpgradeGroup,
Upgrade/*,
upgrade_groups/upgrade_items/UpgradeItem/status,
minimal_response=true&_=1489680258782
{code}
This call gets turn into a LOT of queries, but some seem to be based on the
number of stages. For example, this one on a very small upgrade produces very
poor SQL...
{code}
SELECT
stage_id,
cluster_host_info,
cluster_id,
command_execution_type,
command_params,
display_status,
host_params,
log_info,
request_context,
request_id,
skippable,
status,
supports_auto_skip_failure
FROM stage
WHERE ((request_id = ?)
AND ((((((((stage_id = ?)
OR (stage_id = ?))
OR (stage_id = ?))
OR (stage_id = ?))
OR (stage_id = ?))
OR (stage_id = ?))
OR (stage_id = ?))
OR (stage_id = ?)))
{code}
Diffs
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ambari-server/src/main/java/org/apache/ambari/server/controller/internal/StageResourceProvider.java
8759844
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeItemResourceProvider.java
bf0fa33
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/StageEntity.java
49c1594
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/StageEntityPK.java
34d175c
ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java
eee913a
Diff: https://reviews.apache.org/r/58218/diff/1/
Testing
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PENDING
Thanks,
Jonathan Hurley
