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Fix shared timer race #2084 #2085

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merged 9 commits into from
Mar 14, 2023
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@mmimica mmimica commented Feb 28, 2023

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ulvii and others added 8 commits December 3, 2020 12:37
Release | Merge dev to master for 9.1.1-preview release
# Conflicts:
#	CHANGELOG.md
#	README.md
#	azure-pipelines.yml
#	build.gradle
#	mssql-jdbc_auth_LICENSE
#	pom.xml
#	src/main/java/com/microsoft/sqlserver/jdbc/IOBuffer.java
#	src/main/java/com/microsoft/sqlserver/jdbc/SQLJdbcVersion.java
#	src/main/java/com/microsoft/sqlserver/jdbc/SQLServerConnection.java
#	src/main/java/com/microsoft/sqlserver/jdbc/SQLServerMSAL4JUtils.java
#	src/samples/adaptive/pom.xml
#	src/samples/alwaysencrypted/pom.xml
#	src/samples/azureactivedirectoryauthentication/pom.xml
#	src/samples/connections/pom.xml
#	src/samples/constrained/pom.xml
#	src/samples/dataclassification/pom.xml
#	src/samples/datatypes/pom.xml
#	src/samples/resultsets/pom.xml
#	src/samples/sparse/pom.xml
#	src/test/java/com/microsoft/sqlserver/jdbc/TestResource.java
#	src/test/java/com/microsoft/sqlserver/jdbc/databasemetadata/DatabaseMetaDataTest.java
#	src/test/java/com/microsoft/sqlserver/jdbc/fedauth/ErrorMessageTest.java
@Jeffery-Wasty Jeffery-Wasty linked an issue Feb 28, 2023 that may be closed by this pull request
@Jeffery-Wasty Jeffery-Wasty added this to the 12.3.0 milestone Feb 28, 2023
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Jeffery-Wasty commented Mar 10, 2023

After reviewing the PR again and talking with the team, I agree with the code changes, but I'm personally having issues running the test. I think it may just be my environment and will get back to you if when I can confirm everything is working correctly.

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Not sure if this actually waits for an approval and if I'm the right person to approve, but still: Looks fine 👍

I was able to reproduce the race condition (an NPE was thrown) with the test before the fix and can verify that the NPE is gone after the fix is applied.

I also wrote an extended version of the test, using a latch to make sure all threads start at the same time. But as it turned out your test works fine for reproducing the issue.

(Due to security manager issues I just made a local copy of SharedTime and used that.)

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Hi @jubax,

Yes, we were just making sure the test was passing consistently. I was having issues on my end, but that has been resolved. Everything looks fine, we'll look at getting this merged.

@Jeffery-Wasty Jeffery-Wasty merged commit 178819d into microsoft:main Mar 14, 2023
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SharedTimer race condition
7 participants