umamaheswararao commented on PR #3460:
URL: https://github.com/apache/ozone/pull/3460#issuecomment-1142510133
Anyway we are marking nodes failed after key create and and getting the
nodes which are part of pipeline. MultiNodePipelineBlockAllocator#allocateBlock
is more predictable node selection. So, we will choose first required nodes for
first allocate block and then next remaining nodes in order for next
allocateBlock. So, by default we initialize this class with 15 nodes in
cluster. So, if we just create one key with one block in it, it should always
choose first required nodes.
Probably you can create your own client like this test doing, so that other
tests would not have used that nodes.
Ex:
```
public void testStripeWriteRetriesOnFailures(OzoneConfiguration con,
int clusterSize, int[] nodesIndexesToMarkFailure) throws IOException {
close();
MultiNodePipelineBlockAllocator blkAllocator =
new MultiNodePipelineBlockAllocator(con, dataBlocks + parityBlocks,
clusterSize);
createNewClient(con, blkAllocator);
```
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