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https://issues.apache.org/jira/browse/HDDS-11261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17877951#comment-17877951
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Ethan Rose commented on HDDS-11261:
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I just resolved it. Thanks for reporting!
> Get key answer with "There are insufficient datanodes to read the EC block"
> even nodes amount is sufficient
> -----------------------------------------------------------------------------------------------------------
>
> Key: HDDS-11261
> URL: https://issues.apache.org/jira/browse/HDDS-11261
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Alex Juncevich
> Assignee: Alex Juncevich
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.5.0
>
>
> How to reproduce:
> # Create cluster with 9 datanodes
> # On datanode create volume (ozone sh volume create /data)
> # Create bucket with EC replication rs-6-3-1024k (ozone sh bucket create
> data/test-bucket --type EC --replication rs-6-3-1024k)
> # Create file e.x. 50 MB (fallocate -l 10M small_file_1)
> # Put file to bucket (ozone sh key put data/test-bucket/small_file_1
> small_file_1 --type EC --replication rs-6-3-1024k)
> # Disable 4 nodes
> # Try to get file from bucket (ozone sh key get
> /data/test-bucket/small_file_1 /tmp/sm_1_1)
> # You will get "There are insufficient datanodes to read the EC block". It's
> ok, nodes amount should be at least 6.
> # Enable 1 node and as fast as possible try to get file.
> # You will get "There are insufficient datanodes to read the EC block". It
> is not ok, nodes now 6.
> # You can try get file from minute later and get this error again.
> I reproduced it via docker-compose. With fixed nodes ip addresses (it's
> important, because docker compose can change ip addresses if not fix).
> Why it happened? Command getKey in Ozone Manager has cache. And this cache in
> this case is not actual. When we try to get file again and again OM return
> for us list of 5 nodes, instead of 6.
> I solved it by recreate blockReader with blockReader from refreshFunction.
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