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From "Chinmay Kulkarni (Jira)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-5545) DropChildViews Task fails for a base table when its child view has an index
Date Fri, 25 Oct 2019 06:37:00 GMT
Chinmay Kulkarni created PHOENIX-5545:
-----------------------------------------

             Summary: DropChildViews Task fails for a base table when its child view has an
index
                 Key: PHOENIX-5545
                 URL: https://issues.apache.org/jira/browse/PHOENIX-5545
             Project: Phoenix
          Issue Type: Bug
    Affects Versions: 4.15.0, 5.1.0
            Reporter: Chinmay Kulkarni
             Fix For: 4.15.0, 5.1.0


1) Start the HBase server with 4.15.0 Phoenix
2) Connect with a 4.15.0 client
3) Create a base table and a view on top of the base table and create an index on top of this
view:
{code:sql}
CREATE TABLE IF NOT EXISTS Z_BASE_TABLE (ID INTEGER NOT NULL PRIMARY KEY, HOST VARCHAR(10),
FLAG BOOLEAN);

CREATE VIEW Z_VIEW1 (col1 INTEGER, col2 INTEGER, col3 INTEGER, col4 INTEGER, col5 INTEGER)
AS SELECT * FROM Z_BASE_TABLE WHERE ID>10;

CREATE INDEX V_I ON Z_VIEW1(COL4);
{code}

4) Drop the base table with the cascade option:
{code:sql}
DROP TABLE Z_BASE_TABLE CASCADE;
{code}

5) DropChildViews Task gets added to the SYSTEM.TASK table as expected, but when it gets scheduled
and subsequently executed, it fails with the following exception:
{code:java}
2019-10-24 22:44:34,214 ERROR [pool-121-thread-1] tasks.DropChildViewsTask: Exception while
dropping a child view task. null.Z_BASE_TABLE with tenant id  IS NULL and timestamp 292278994-08-16
23:12:55.807
org.apache.phoenix.exception.PhoenixIOException: Z_BASE_TABLE
	at org.apache.phoenix.query.ConnectionQueryServicesImpl.flushTable(ConnectionQueryServicesImpl.java:4442)
	at org.apache.phoenix.query.ConnectionQueryServicesImpl.flushParentPhysicalTable(ConnectionQueryServicesImpl.java:1922)
	at org.apache.phoenix.query.ConnectionQueryServicesImpl.dropTable(ConnectionQueryServicesImpl.java:1888)
	at org.apache.phoenix.schema.MetaDataClient.dropTable(MetaDataClient.java:3152)
	at org.apache.phoenix.schema.MetaDataClient.dropTable(MetaDataClient.java:3060)
	at org.apache.phoenix.util.ViewUtil.dropChildViews(ViewUtil.java:207)
	at org.apache.phoenix.coprocessor.tasks.DropChildViewsTask.run(DropChildViewsTask.java:60)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.phoenix.coprocessor.TaskRegionObserver$SelfHealingTask.run(TaskRegionObserver.java:204)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.hadoop.hbase.TableNotFoundException: Z_BASE_TABLE
	at org.apache.hadoop.hbase.client.HBaseAdmin.checkTableExists(HBaseAdmin.java:2863)
	at org.apache.hadoop.hbase.client.HBaseAdmin.flush(HBaseAdmin.java:1904)
	at org.apache.hadoop.hbase.client.HBaseAdmin.flush(HBaseAdmin.java:1949)
	at org.apache.phoenix.query.ConnectionQueryServicesImpl.flushTable(ConnectionQueryServicesImpl.java:4440)
	... 18 more
{code}

Note that this marks the DropChildViews task for the base table as failed and so *if the base
table has any other views, those views will also not be dropped*.



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