GeezerVison is showing github.com — Coverage Report doesn't run (or takes forever) · Issue #970 · utPLSQL/utPLSQL
Coverage Report doesn't run (or takes forever) #970DescriptionThe coverage report doesn't run or takes forever.
version: 18.0.0.0.0
compatibility: 18.0.0
ut_version: v3.1.3.2402
Edition: Oracle Database 18c Enterprise Edition Release 18.0.0.0.0
Port String: x86_64/Linux 2.4.xx
Information about client software
SQLDeveloper, SQLPlus, utPLSQL-cli
To Reproduce
./utplsql run ***/***@host:1521/*** -f=ut_coverage_html_reporter -o=coverage.html
Expected behavior
A HTML file with the coverage report
Details of the issue
A couple of "utPLSQL" and "JDBC Thin Client" database sessions get stuck waiting forever for the following wait-events:
- resmgr:cpu quantum
- PL/SQL lock timer
- PX Deq: Execute Reply
The SQL running queries are:
select full_name
, owner
, name
, line
, to_be_skipped
, text
from (
select lower(s.owner || '.' || s.name) as full_name
, s.owner
, s.name
, s.line - coalesce(
case
when type != 'TRIGGER' then
0
end
,(
select min(t.line) - 1
from dba_source t
where t.owner = s.owner
and t.type = s.type
and t.name = s.name
and regexp_like(t.text, '[A-Za-z0-9$#_]*(begin|declare|compound).*', 'i')
)) as line
, s.text
, case
when
-- to avoid execution of regexp_like on every line
-- first do a rough check for existence of search pattern keyword
( lower(s.text) like '%procedure%'
or lower(s.text) like '%function%'
or lower(s.text) like '%begin%'
or lower(s.text) like '%end%'
or lower(s.text) like '%package%' )
and regexp_like ( s.text
, '^([\t ]*(((not)?\s*(overriding|final|instantiable)[\t ]*)*(static|constructor|member)?[\t ]*(procedure|function)|package([\t ]+body)|begin|end([\t ]+\S+)*[ \t]*;))'
, 'i' ) then
'Y'
end as to_be_skipped
from dba_source s
where s.owner in (
select upper(t.column_value)
from table ( :l_schema_names ) t
)
and s.type not in (
'PACKAGE'
, 'TYPE'
, 'JAVA SOURCE'
)
--Exclude calls to utPLSQL framework, Unit Test packages and objects from a_exclude_list parameter of coverage reporter
and ( s.owner
, s.name ) not in (
select el.owner
, el.name
from table ( :l_skipped_objects ) el
)
)
where line > 0
and
select column_value as text
from table ( ( :b1 ).get_lines ( :b2
, :b3 ) )
Running the tests works fine. Only the Coverage Report doesn't run. Activitylwasylow commented on Jul 7, 2019 Hi did you try 3.1.7? There were improvements in terms of overall performance. rafael-trevisan commented on Jul 7, 2019 jgebal commented on Jul 7, 2019 What schema are you running coverage on?
How many code objects (packages /triggers/procedures etc) do you have in that schema?
If the query is stuck I suspect it's due to huge schema or lack of up to date fixed table statistics. rafael-trevisan commented on Jul 8, 2019 I'm running on the application schema.
Not many packages/triggers. About 30 packages and 60 triggers. Shouldn't take this long. I remember running the same "Coverage Report" not so long ago and it was fine. The only big change I can recall was changing the Oracle from non-pdb to pdb. Other than that is the same. I will get utPLSQL upgraded in the server this week and will try again.
Table stats seem to be fine too. rafael-trevisan commented on Jul 8, 2019 Hi guys, I upgraded utPLSQL to 3.1.7 but it didn't fix the issue.
Whenever I run a Coverage Report it gets stuck.
The findings I have so far are:
- it seems utPLSQL ends up opening 2 sessions (module utPLSQL) and these 2 sessions run the same query in parallel (px), however, one session gets blocked by the other. When this happens the CPU on the server goes up to 100% and then it never finishes running the report.
I will be troubleshooting this today. If someone has any idea or suggestion they'd be very appreciated :) rafael-trevisan commented on Jul 8, 2019 Another finding here:
The DBA also pointed another related session under the module "JDBC Thin Client". He said this session was waiting due to a dbms_session.lock
Don't know if that helps somehow pesse commented on Jul 8, 2019 Hey @rafael-trevisan , which version of utplsql-cli are you using?
You can find out by doing ./utplsql info
It would also be great if you did a run with -d parameter and send me the output:
./utplsql run ***/***@host:1521/*** -f=ut_coverage_html_reporter -o=coverage.html rafael-trevisan commented on Jul 8, 2019 Here you go
ip-192-168-1-87:bin Rafael$ ./utplsql run ***/***@***:1521/*** -d -f=ut_coverage_html_reporter -o=coverage.html
2019-07-08 12:25:30 [main] INFO org.utplsql.cli.RunCommand - ########## utPLSQL cli ###########
# #
# utPLSQL-cli 3.1.6.local #
# utPLSQL-java-api 3.1.6.411 #
# Java-Version: 1.8.0_191 #
# ORACLE_HOME: null #
# NLS_LANG: null #
# #
# Thanks for testing! #
# #
##################################
2019-07-08 12:25:30 [main] INFO org.utplsql.cli.RunCommand -
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - HikariPool-1 - configuration:
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - allowPoolSuspension.............false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - autoCommit......................false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - catalog.........................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - connectionInitSql...............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - connectionTestQuery.............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - connectionTimeout...............30000
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSource......................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSourceClassName.............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSourceJNDI..................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSourceProperties............{password=<masked>}
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - driverClassName.................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - healthCheckProperties...........{}
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - healthCheckRegistry.............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - idleTimeout.....................600000
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - initializationFailTimeout.......1
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - isolateInternalQueries..........false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - jdbcUrl.........................jdbc:oracle:oci8:@***:1521/***
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - leakDetectionThreshold..........0
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - maxLifetime.....................1800000
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - maximumPoolSize.................3
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - metricRegistry..................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - metricsTrackerFactory...........none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - minimumIdle.....................3
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - password........................<masked>
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - poolName........................"HikariPool-1"
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - readOnly........................false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - registerMbeans..................false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - scheduledExecutor...............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - schema..........................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - threadFactory...................internal
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - transactionIsolation............default
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - username........................"***"
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - validationTimeout...............5000
2019-07-08 12:25:30 [main] INFO com.zaxxer.hikari.HikariDataSource - HikariPool-1 - Starting...
2019-07-08 12:25:30 [main] DEBUG c.z.hikari.util.DriverDataSource - Loaded driver with class name oracle.jdbc.OracleDriver for jdbcUrl=jdbc:oracle:oci8:@***:1521/***
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - HikariPool-1 - configuration:
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - allowPoolSuspension.............false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - autoCommit......................false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - catalog.........................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - connectionInitSql...............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - connectionTestQuery.............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - connectionTimeout...............30000
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSource......................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSourceClassName.............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSourceJNDI..................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - dataSourceProperties............{password=<masked>}
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - driverClassName.................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - healthCheckProperties...........{}
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - healthCheckRegistry.............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - idleTimeout.....................600000
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - initializationFailTimeout.......1
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - isolateInternalQueries..........false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - jdbcUrl.........................jdbc:oracle:thin:@***:1521/***
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - leakDetectionThreshold..........0
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - maxLifetime.....................1800000
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - maximumPoolSize.................3
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - metricRegistry..................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - metricsTrackerFactory...........none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - minimumIdle.....................3
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - password........................<masked>
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - poolName........................"HikariPool-1"
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - readOnly........................false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - registerMbeans..................false
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - scheduledExecutor...............none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - schema..........................none
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - threadFactory...................internal
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - transactionIsolation............default
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - username........................"***"
2019-07-08 12:25:30 [main] DEBUG com.zaxxer.hikari.HikariConfig - validationTimeout...............5000
2019-07-08 12:25:30 [main] INFO com.zaxxer.hikari.HikariDataSource - HikariPool-1 - Starting...
2019-07-08 12:25:30 [main] DEBUG c.z.hikari.util.DriverDataSource - Loaded driver with class name oracle.jdbc.OracleDriver for jdbcUrl=jdbc:oracle:thin:@***:1521/***
2019-07-08 12:25:31 [main] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Added connection oracle.jdbc.driver.T4CConnection@646d64ab
2019-07-08 12:25:31 [main] INFO com.zaxxer.hikari.HikariDataSource - HikariPool-1 - Start completed.
2019-07-08 12:25:31 [main] INFO o.u.c.d.TestedDataSourceProvider - Use connection string jdbc:oracle:thin:****/****@***:1521/***
2019-07-08 12:25:31 [HikariPool-1 housekeeper] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Pool stats (total=1, active=1, idle=0, waiting=0)
2019-07-08 12:25:31 [main] INFO org.utplsql.cli.RunCommand - Successfully connected to database. UtPLSQL core: v3.1.7.3096
2019-07-08 12:25:31 [main] INFO org.utplsql.cli.RunCommand - Oracle-Version: 18.0.0.0.0
2019-07-08 12:25:32 [main] DEBUG c.zaxxer.hikari.pool.ProxyConnection - HikariPool-1 - Executed rollback on connection oracle.jdbc.driver.T4CConnection@646d64ab due to dirty commit state on close().
2019-07-08 12:25:32 [HikariPool-1 connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Added connection oracle.jdbc.driver.T4CConnection@115564
2019-07-08 12:25:32 [main] DEBUG org.utplsql.api.reporter.Reporter - Database-reporter initialized, Type: UT_COVERAGE_HTML_REPORTER, ID: 8D31685B819C05C4E053BA0216AC68B7
2019-07-08 12:25:32 [HikariPool-1 connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Added connection oracle.jdbc.driver.T4CConnection@7a179d7e
2019-07-08 12:25:32 [HikariPool-1 connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - After adding stats (total=3, active=0, idle=3, waiting=0)
2019-07-08 12:25:33 [pool-1-thread-1] INFO org.utplsql.cli.RunTestRunnerTask - Running tests now.
2019-07-08 12:25:33 [pool-1-thread-1] INFO org.utplsql.cli.RunTestRunnerTask - --------------------------------------
2019-07-08 12:25:33 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - TestRunner initialized
2019-07-08 12:25:33 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - Running on utPLSQL v3.1.7.3096
2019-07-08 12:25:33 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - Initializing reporters
2019-07-08 12:25:34 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - Running tests
2019-07-08 12:26:01 [HikariPool-1 housekeeper] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Pool stats (total=3, active=2, idle=1, waiting=0)
2019-07-08 12:26:31 [HikariPool-1 housekeeper] DEBUG com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Pool stats (total=3, active=2, idle=1, waiting=0)
...
...
...
rafael-trevisan commented on Jul 8, 2019 The session gets stuck waiting for PX and this is the explain plan:
SELECT STATEMENT Cost = 61
SORT AGGREGATE
PX COORDINATOR
PX SEND QC (RANDOM) :TQ10000
SORT AGGREGATE
PX PARTITION LIST ALL
EXTENDED DATA LINK FULL INT$DBA_SOURCE
VIEW
MERGE JOIN ANTI NA
SORT JOIN
HASH JOIN SEMI
PX COORDINATOR
PX SEND QC (RANDOM) :TQ20000
PX PARTITION LIST ALL
EXTENDED DATA LINK FULL INT$DBA_SOURCE
COLLECTION ITERATOR PICKLER FETCH
SORT UNIQUE
COLLECTION ITERATOR PICKLER FETCH
rafael-trevisan commented on Jul 8, 2019 Another thing here.
If I run within SQLDev the Coverage Report for a single package, it works:
begin
ut.run(
'my_schema', ut_coverage_html_reporter(),
a_include_objects => ut_varchar2_list('my_package')
);
end;
However, if I remove the filter for the objects, it gets stuck again with the same wait event in the same query. rafael-trevisan commented on Jul 9, 2019 Hi guys,
Some update on this.
The DBA did some investigation, and after commenting out (for only testing purpose) the line 60 of ut3.ut_coverage we got the Coverage Report working here.
The line we commented out is:
and regexp_like( t.text, '[A-Za-z0-9$#_]*(begin|declare|compound).*','i')
If we put this line back, the session gets stuck again and never finishes.
Would this be safe to use as a workaround or could that bring potentially problem that we aren't aware? lwasylow commented on Jul 9, 2019 I believe it will report incorrectly on lines for triggers. Would be interesting to see what executions plans are selected. rafael-trevisan commented on Jul 9, 2019 I will try to get the execution plan here.
Would there be a way to run the Coverage Report only for packages then? I mean, I know there are parameters to filter including/excluding object names, but am not sure about object types. lwasylow commented on Jul 9, 2019 I don't think so but that's probably a good enhancements idea.
Do you have an source code of packages in file? If so you can try to use a a_source_file_mappings and if you point on folder with source code that have only packages than it will limit. But that's very depend on how your db project is setup. Maybe @jgebal got some idea? rafael-trevisan commented on Jul 9, 2019 I do have all my source code in files. I tried to use this mapping parameter once but I didn't get much lucky.
My current folder structure is:
./db
src
packages
package1.pks
package1.pkb
package2.pks
package2.pkb
test
test_package1.pks
test_package1.pkb
test_package2.pks
test_package2pkb
How would be the a_source_file_mappings with this structure? tetardv commented on Jul 12, 2019 hello,
for me disabling parallel query and dml remove the timeout, so now my coverage has been running for more than 6hours now. The database im running into is docker image created from Oracle repo itself, I can make any change I want to since I am administering it even if I am not the dba of my company. But what parameters should I change ?
regards,
vincent PhilippSalvisberg commented on Jul 12, 2019
Would be helpful to hint these queries that access the data dictionary to not run in parallel?
@rafael-trevisan first of all we have to find the root cause. So, the questions remains. How long did the anonymous PL/SQL block ran in your environment (with disable parallel query and parallel dml)? rafael-trevisan commented on Jul 12, 2019 Yes, definitely. I meant as a workaround until 2020 when Oracle replies the SR
…
On Jul 12, 2019, at 5:47 AM, Jacek Gębal ***@***.***> wrote:
Shouldn't this be fixed at DB itself?
Seems like your database is misconfigured and querying dba_source goes parallel causing performance issiues.
It will be hard for utplsql to address all possible db config challenges.
We could add noparrallel hint to coverage query though I'm not sure if it's right thing to do.
We might fix it for some and break it for others.
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub, or mute the thread.
PhilippSalvisberg commented on Jul 12, 2019
Yes, definitely. I meant as a workaround until 2020 when Oracle replies the SR
@rafael-trevisan and what is the runtime without parallel query/dml? Without this information we do not know if this is a viable workaround. rafael-trevisan commented on Jul 12, 2019
Yes, definitely. I meant as a workaround until 2020 when Oracle replies the SR
@rafael-trevisan and what is the runtime without parallel query/dml? Without this information we do not know if this is a viable workaround.
I'll uncomment the line and regexp_like( t.text, '[A-Za-z0-9$#_]*(begin|declare|compound).*','i') and will test it. Will share the results here. PhilippSalvisberg commented on Jul 12, 2019
But what parameters should I change ?
@tetardv I suggest to run
begin
dbms_stats.gather_dictionary_stats;
end;
/
before trying to run the coverage report again. PhilippSalvisberg commented on Jul 12, 2019
I'll uncomment the line and regexp_like( t.text, '[A-Za-z0-9$#_]*(begin|declare|compound).*','i') and will test it. Will share the results here.
But we already know that commenting out this line helps and that it produces a false result. So, I suggest to test it without changing the utPLSQL code. Thanks. rafael-trevisan commented on Jul 14, 2019 Hi all, disabling the parallel in the session didn't resolve the issue. It changed indeed the wait event from PX deq something to db file sequential read, but it never finished running the report.
After continuing the investigation it became clear that and regexp_like(... was making the inner query to be very very slow. When we changed the line 60 to be a set of or t.text like '%begin%' (pseudo-code just as example), it ran beautifully.
Interestingly, line 66 seems to have thought about this issue 🤔
Anyways, in the end the DBA changed a bit the query to keep the regex_like but he used the with command to query the dba_source just once and then pointed the outer and inner query to use this "with dataset". This workaround also worked beautifully (even faster than having or like or like or like) and it's the one we decided to keep.
We will post here the code he changed, but I hope this comment helps to understand and explain the issue. Reacted by Philipp Salvisberg and tetardv jgebal commented on Jul 14, 2019 Thanks @rafael-trevisan
I will include that fix (once you publish it).
I also have another improvement for coverage query waiting to be published.
You can see it here
The idea is to separate the more complex query (on Triggers) from the one that is more straightforward.
If your schema doesn't contain triggers, you should see it running a bit faster too. tetardv commented on Jul 16, 2019 hello,
Removing the line 'and regexp_like( t.text, '[A-Za-z0-9$#_](begin|declare|compound).','i')' worked for me as well. And @PhilippSalvisberg only created the html file with no input, it find no objects at all.
looking forward to have this issue fix then. Thank you guys.
Regards,
vincent. jgebal commented on Jul 16, 2019 @rafael-trevisan
Anyways, in the end the DBA changed a bit the query to keep the regex_like but he used the with command to query the dba_source just once and then pointed the outer and inner query to use this "with dataset". This workaround also worked beautifully (even faster than having or like or like or like) and it's the one we decided to keep.
Can you provide the modified query text? fabiopan commented on Jul 17, 2019
@rafael-trevisan
Anyways, in the end the DBA changed a bit the query to keep the regex_like but he used the with command to query the dba_source just once and then pointed the outer and inner query to use this "with dataset". This workaround also worked beautifully (even faster than having or like or like or like) and it's the one we decided to keep.
Can you provide the modified query text?
Below is the change we have made.
#980
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