dlmarion commented on PR #5780:
URL: https://github.com/apache/accumulo/pull/5780#issuecomment-3160057975
SuspendMarkerIT was failing with the following stack trace:
```
2025-08-06T12:21:47,830 66 [zookeeper.ZooCache] WARN : Saw (possibly)
transient exception communicating with ZooKeeper, will retry
org.apache.accumulo.core.zookeeper.ZooCache$ZcException:
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode =
ConnectionLoss for /namespaces
at
org.apache.accumulo.core.zookeeper.ZooCache$2.lambda$0(ZooCache.java:461)
~[classes/:?]
at
com.github.benmanes.caffeine.cache.BoundedLocalCache.lambda$remap$16(BoundedLocalCache.java:2880)
~[caffeine-3.2.0.jar:3.2.0]
at
java.base/java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1908)
~[?:?]
at
com.github.benmanes.caffeine.cache.BoundedLocalCache.remap(BoundedLocalCache.java:2875)
~[caffeine-3.2.0.jar:3.2.0]
at
com.github.benmanes.caffeine.cache.BoundedLocalCache.compute(BoundedLocalCache.java:2824)
~[caffeine-3.2.0.jar:3.2.0]
at
com.github.benmanes.caffeine.cache.LocalCache.compute(LocalCache.java:99)
~[caffeine-3.2.0.jar:3.2.0]
at org.apache.accumulo.core.zookeeper.ZooCache$2.run(ZooCache.java:436)
~[classes/:?]
at org.apache.accumulo.core.zookeeper.ZooCache$2.run(ZooCache.java:1)
~[classes/:?]
at
org.apache.accumulo.core.zookeeper.ZooCache$ZooRunnable.retry(ZooCache.java:292)
~[classes/:?]
at org.apache.accumulo.core.zookeeper.ZooCache.get(ZooCache.java:474)
~[classes/:?]
at
org.apache.accumulo.core.clientImpl.NamespaceMapping.update(NamespaceMapping.java:143)
~[classes/:?]
at
org.apache.accumulo.core.clientImpl.NamespaceMapping.getNameToIdMap(NamespaceMapping.java:173)
~[classes/:?]
at
org.apache.accumulo.core.clientImpl.ClientContext.getNamespaceId(ClientContext.java:570)
~[classes/:?]
at
org.apache.accumulo.core.clientImpl.ClientContext.getTableId(ClientContext.java:598)
~[classes/:?]
at
org.apache.accumulo.core.clientImpl.ClientContext.createConditionalWriter(ClientContext.java:833)
~[classes/:?]
at
org.apache.accumulo.server.ServerContext.createSharedConditionalWriter(ServerContext.java:499)
~[classes/:?]
at
org.apache.accumulo.server.ServerContext.lambda$10(ServerContext.java:149)
~[classes/:?]
at
com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:198)
~[guava-33.4.6-jre.jar:?]
at
org.apache.accumulo.server.ServerContext.close(ServerContext.java:524)
~[classes/:?]
at
org.apache.accumulo.miniclusterImpl.MiniAccumuloClusterImpl.terminate(MiniAccumuloClusterImpl.java:1056)
~[classes/:?]
at
org.apache.accumulo.test.functional.ConfigurableMacBase.tearDown(ConfigurableMacBase.java:194)
~[classes/:?]
```
`ServerAmplImpl.conditionallyMutateTablets()` passes the Suppliers for the
metadata and user shared writers to the ConditionalTabletsMutatorImpl
constructor, but the shared writer is only created in
`ConditionalTabletsMutatorImpl.process` if the metadata or user tablet is
modified. If only one table is modified, then the other writer is not created
and will be created during `ServerContext.close`.
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