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Posted to issues@ignite.apache.org by "Ignite TC Bot (Jira)" <ji...@apache.org> on 2020/12/25 08:24:00 UTC
[jira] [Commented] (IGNITE-13906) Possible deadlock between methods
from GridEncryptionManager
[ https://issues.apache.org/jira/browse/IGNITE-13906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17254773#comment-17254773 ]
Ignite TC Bot commented on IGNITE-13906:
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{panel:title=Branch: [pull/8608/head] Base: [master] : No blockers found!|borderStyle=dashed|borderColor=#ccc|titleBGColor=#D6F7C1}{panel}
{panel:title=Branch: [pull/8608/head] Base: [master] : No new tests found!|borderStyle=dashed|borderColor=#ccc|titleBGColor=#F7D6C1}{panel}
[TeamCity *--> Run :: All* Results|https://ci.ignite.apache.org/viewLog.html?buildId=5804324&buildTypeId=IgniteTests24Java8_RunAll]
> Possible deadlock between methods from GridEncryptionManager
> ------------------------------------------------------------
>
> Key: IGNITE-13906
> URL: https://issues.apache.org/jira/browse/IGNITE-13906
> Project: Ignite
> Issue Type: Bug
> Affects Versions: 2.9
> Reporter: Mirza Aliev
> Assignee: Mirza Aliev
> Priority: Major
> Fix For: 2.10
>
>
> It seems that {{GridEncryptionManager}} uses {{metaStorageMux}} and {{checkpointReadLock}} in an inconsistent way.
> Sometimes, the implementation acquires the mutex fist and then {{checkpointReadLock}}, sometimes vice versa, which may lead to a deadlock.
> Let's consider the following scenario:
> Thread-1: {{removeGroupKey}} acquired {{metaStorageMux}} and trying to get {{checkpointReadLock}} (cannot proceed further because of checkpointer)
> Therad-2: {{doChangeMasterKey}} acquired {{checkpointReadLock}} and trying to get {{metaStorageMux}} (cannot proceed further due to thread-1)
> Checkpointer-thread: trying to acquire the write lock (cannot get the lock due to thread-2)
>
> Possible solutuion: acquire {{metaStorageMux}} before {{checkpointReadLock}} in {{doChangeMasterKey}} method
>
>
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