[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17296462#comment-17296462
]
Andrew Gaul commented on JCLOUDS-1504:
--
[~theghost5800] would you like to try fixing this?
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17230627#comment-17230627
]
Kristian Atanasov commented on JCLOUDS-1504:
I did create some test application which run in separate thread create/upload
blob in s3-blobstore, in main thread execute list method including metadata and
wait until thread finish work, after that again in separate thread execute
removeBlob method and in main thread execute list method including metadata and
then fails with NPE due to returned null for blob metadata. So I don't see what
further investigation is necessary, a fix should be applied in jclouds library
and return set of blobs with or empty metadata map.
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17229958#comment-17229958
]
Kristian Atanasov commented on JCLOUDS-1504:
Hello [~gaul],
I hit the same issue with my application using aws-s3 objectstore with jclouds.
It does not occur on every
{code:java}
PageSet list(String container, ListContainerOptions
options);{code}
method call but when it occurs, throws the following exception:
{code:java}java.lang.NullPointerException: Cannot invoke
"org.jclouds.blobstore.domain.StorageMetadata.getName()" because
"storageMetadata" is null
at
org.jclouds.blobstore.strategy.internal.FetchBlobMetadata.apply(FetchBlobMetadata.java:112)
at org.jclouds.s3.blobstore.S3BlobStore.list(S3BlobStore.java:178)
at
org.cloudfoundry.multiapps.controller.persistence.services.ObjectStoreFileStorage.getEntryNames(ObjectStoreFileStorage.java:188)
at
org.cloudfoundry.multiapps.controller.persistence.services.ObjectStoreFileStorage.removeBlobsByFilter(ObjectStoreFileStorage.java:180)
at
org.cloudfoundry.multiapps.controller.persistence.services.ObjectStoreFileStorage.deleteFilesBySpace(ObjectStoreFileStorage.java:90)
at
org.cloudfoundry.multiapps.controller.persistence.services.FileService.deleteBySpace(FileService.java:133){code}
I am using jclouds version 2.2.1 .
I have tried to filter nulls from PageSet but this won't help because in latest
version there is [new
change|https://github.com/apache/jclouds/commit/5ac92111c4e9347c492a16ecd402acafdb1f9cd7#diff-e5fdbb44b36c6fd2f70b7cb31c38a6fc6facb0d2c8141a3e558538b7d6aecbbbR112]
which is related with [list() result
order|https://issues.apache.org/jira/browse/JCLOUDS-1543]. Now I can't filter
out null elements from PageSet in my code because the issue is inside jclouds
library. So what I can do to avoid this NPE and retrieve blobs with metadata
together without any additional performance impact?
Thanks,
Kristian
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16907443#comment-16907443
]
Andrew Gaul commented on JCLOUDS-1504:
--
You can find an explanation of eventual consistency here:
https://github.com/gaul/are-we-consistent-yet
I am sorry you feel like your questions have not been answered, although I have
suggested an alternate and more correct fix. I don't have the time to
investigate this myself and no other user has reported these symptoms so you
you will need to do this work yourself. I recommend re-reading my responses
which have several suggestions.
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16906885#comment-16906885
]
Енчо Белезирев commented on JCLOUDS-1504:
-
Hi [~gaul],
I have explained above, the nulls are produced for the 404 Not Found HTTP
Statuses returned when querying the blobs. For me this is not OK, to return
null as blobMetadata. I agree that we need to find the root cause but all my
questions have been left unanswered in this issue and the github PR was closed
without my questions been answered there, as well.
Also, could you explain to me what is that "eventual consistency"? If this is
really the way I agree to put null filtering for the blobs.
For now, I do not understand your statement "the blobMetadata could be null ->
this could rise NullPointerException but it is okay".
Thanks,
Encho
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
--
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16906566#comment-16906566
]
Andrew Gaul commented on JCLOUDS-1504:
--
It is possible that {{blobMetadata}} will return {{null}} for for objects
recently created or deleted during a {{S3BlobStore.list}} call due to eventual
consistency. One possible fix would be to filter out null elements in
{{S3BlobStore.list}}. However, it is not obvious to me that this is the
behavior you have observed. It might help to examine the logs or share more
about your environment.
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
--
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16887977#comment-16887977
]
Енчо Белезирев commented on JCLOUDS-1504:
-
Hello [~nacx], I have added a PR for the fix:
[https://github.com/jclouds/jclouds/pull/1276]
Could you please review it and comment it if you see some problems?
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16887117#comment-16887117
]
Енчо Белезирев commented on JCLOUDS-1504:
-
Hello [~nacx], Is there any update on the issue?
There is no progress here and we really need some statement?
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am an SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16880991#comment-16880991
]
Енчо Белезирев commented on JCLOUDS-1504:
-
Hello,
As we really need some insight, could someone update the ticket?
Also, an explanation will be great.
Thanks,
Encho
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am an SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16874666#comment-16874666
]
Енчо Белезирев commented on JCLOUDS-1504:
-
Hello,
Is there any update here?
In my understanding the problem is that when some file is being deleted, when
the call to the blobstore is made, the metadata for this deleted file is null.
Is there any chance, in such cases the collector of the metadata to not contain
the null values?
Thanks,
Encho
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
> Attachments: jclouds-wire.log, jclouds.log
>
>
> Hello,
> I am an SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
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]
Енчо Белезирев commented on JCLOUDS-1504:
-
Hi,
I am attaching the wire logs. There is something interesting in it. For
instance, there are more than one query for certain blob:
{code:java}
Request: Sending request 782100679: HEAD
https://hcp-a0b4ab71-c807-48c5-85b7-797d57d9613e.s3-eu-central-1.amazonaws.com/12bbc932-79c5-4bed-bc9e-a82c6bc4adce
HTTP/1.1
Response: Receiving response 782100679: HTTP/1.1 404 Not Found
-
Request: Sending request 1063600376: HEAD
https://hcp-a0b4ab71-c807-48c5-85b7-797d57d9613e.s3-eu-central-1.amazonaws.com/12bbc932-79c5-4bed-bc9e-a82c6bc4adce
Response: Receiving response 1063600376: HTTP/1.1 404 Not Found{code}
I have used the following code in order to obtain the blob's metadata:
{code:java}
Iterable modules = ImmutableSet. of(new SLF4JLoggingModule());
// Init
BlobStoreContext context = ContextBuilder.newBuilder("aws-s3")
.credentials("xxx", "")
.modules(modules)
.buildView(BlobStoreContext.class);
BlobStore blobStore = context.getBlobStore();
final String containerName = "";
PageSet list = blobStore.list(containerName,
ListContainerOptions.Builder.withDetails());
for (StorageMetadata resourceMd : list) {
System.out.println(resourceMd.getName());
System.out.println(resourceMd.getUserMetadata());
}
context.close();
{code}
I need the
{code:java}
ListContainerOptions.Builder.withDetails(){code}
because I need the userMetadata which contains some custom info about my blobs.
The NullPointerException is happening on this line:
{code:java}
System.out.println(resourceMd.getName());{code}
A little bit of explanation how the blobstore is being read and written:
# we are uploading files in it
# each file is being deleted after it is processed
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
>
> Hello,
> I am an SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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[jira] [Commented] (JCLOUDS-1504) BlobStore.list(container, ListContainerOptions) returns collection containing null elements
[
https://issues.apache.org/jira/browse/JCLOUDS-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16871511#comment-16871511
]
Ignasi Barrera commented on JCLOUDS-1504:
-
We should then try to understand that {{sometimes}} and see what causes that
behavior. Can you enable the wire logs and check what does AWS return when you
see the null objects?
> BlobStore.list(container, ListContainerOptions) returns collection containing
> null elements
>
>
> Key: JCLOUDS-1504
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1504
> Project: jclouds
> Issue Type: Bug
>Reporter: Енчо Белезирев
>Priority: Blocker
>
> Hello,
> I am an SAP developer and we are using jclouds for the communication with our
> blob stores.
> We have issue with the querying of the StorageMetadata for some blobs. We are
> using the method from the BlobStore -
> {code:java}
> PageSet list(String container,
> ListContainerOptions options);{code}
> However, when we are using the method, we are providing
> ListContainerOptions.Builder.withDetails() because we want to take directly
> the userMetadata field from the StorageMetadata object and to use it later
> on. Here comes the problem, sometimes, when the method is being executed, the
> list that is being returned contains null objects. This is a problem because
> we want each StorageMetadata to be non-null.
> I have validated our entries in the container and it seemed that there are no
> suspicious entries in it(which might cause the issue).
> Could you share some information what could have caused the issue and
> eventually, is there a way to workaround this?
>
> We are using aws-s3 implementation of the blob store.
>
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