Calling BlobClientBase.exists() produces two spans (which is expected):

an INTERNAL span:

SpanData{spanContext=ImmutableSpanContext{traceId=92c3d060568c79c1fafbc818297ea4af, spanId=b98cca7f7c875f09, traceFlags=01, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=true}, parentSpanContext=ImmutableSpanContext{traceId=00000000000000000000000000000000, spanId=0000000000000000, traceFlags=00, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=false}, resource=Resource{schemaUrl=null, attributes={service.name="unknown_service:java", telemetry.sdk.language="java", telemetry.sdk.name="opentelemetry", telemetry.sdk.version="1.42.1"}}, instrumentationScopeInfo=InstrumentationScopeInfo{name=azure-storage-blob, version=12.28.0, schemaUrl=https://opentelemetry.io/schemas/1.17.0, attributes={}}, name=AzureBlobStorageBlob.getPropertiesNoCustomHeaders, kind=INTERNAL, startEpochNanos=1729222313878000000, endEpochNanos=1729222319944232700, attributes=AttributesMap{data={thread.id=1, thread.name=main, az.namespace=Microsoft.Storage}, capacity=128, totalAddedValues=3}, totalAttributeCount=3, events=[ImmutableExceptionEventData{epochNanos=1729222319942186100, exception=com.azure.storage.blob.implementation.models.BlobStorageExceptionInternal: Status code 404, ContainerNotFound, additionalAttributes={}, spanLimits=SpanLimitsValue{maxNumberOfAttributes=128, maxNumberOfEvents=128, maxNumberOfLinks=128, maxNumberOfAttributesPerEvent=128, maxNumberOfAttributesPerLink=128, maxAttributeValueLength=2147483647}}], totalRecordedEvents=1, links=[], totalRecordedLinks=0, status=ImmutableStatusData{statusCode=ERROR, description=}, hasEnded=true}

and a nested CLIENT span:

SpanData{spanContext=ImmutableSpanContext{traceId=92c3d060568c79c1fafbc818297ea4af, spanId=0bc936d658ee0899, traceFlags=01, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=true}, parentSpanContext=ImmutableSpanContext{traceId=92c3d060568c79c1fafbc818297ea4af, spanId=b98cca7f7c875f09, traceFlags=01, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=true}, resource=Resource{schemaUrl=null, attributes={service.name="unknown_service:java", telemetry.sdk.language="java", telemetry.sdk.name="opentelemetry", telemetry.sdk.version="1.42.1"}}, instrumentationScopeInfo=InstrumentationScopeInfo{name=azure-storage-blob, version=12.28.0, schemaUrl=https://opentelemetry.io/schemas/1.17.0, attributes={}}, name=HEAD, kind=CLIENT, startEpochNanos=1729222313971242900, endEpochNanos=1729222316895604300, attributes=AttributesMap{data={applicationinsights.internal.operation_name=AzureBlobStorageBlob.getPropertiesNoCustomHeaders, http.request.resend_count=1, http.url=https://trasktest.blob.core.windows.net/test/test, thread.id=1, az.client_request_id=98c0ae84-0dd9-457d-99fa-fb31220c71aa, az.service_request_id=f0b0a3d5-001e-0018-6a0e-2176da000000, server.port=443, http.method=HEAD, thread.name=main, server.address=trasktest.blob.core.windows.net, http.status_code=404, az.namespace=Microsoft.Storage}, capacity=128, totalAddedValues=12}, totalAttributeCount=12, events=[], totalRecordedEvents=0, links=[], totalRecordedLinks=0, status=ImmutableStatusData{statusCode=ERROR, description=404}, hasEnded=true}

isn't not surprising that the CLIENT span has status ERROR, since it's probably captured by lower-level HTTP instrumentation which doesn't know that a 404 is an expected response code for this operation

what's surprising is that the INTERNAL span has status ERROR and attaches (an oftentimes large) exception stacktrace, even though the call to BlobClientBase.exists() doesn't throw an exception but instead just returns false when the blob is not found.

repro at https://github.com/trask/azure-blob-storage-test

cc @lmolkova @jeanbisutti @heyams @harsimar