Commit Graph

493 Commits

Author SHA1 Message Date
Daniel Carl Jones
b749438a8c
HADOOP-14661. Add S3 requester pays bucket support to S3A (#3962)
Adds the option fs.s3a.requester.pays.enabled, which, if set to true, allows
the client to access S3 buckets where the requester is billed for the IO.

Contributed by Daniel Carl Jones

Change-Id: I51f64d0f9b3be3c4ec493bcf91927fca3b20407a
2022-03-23 20:13:20 +00:00
Steve Loughran
ebdd8771c5
HADOOP-17851. S3A to support user-specified content encoding (#3498)
The option fs.s3a.object.content.encoding declares the content encoding to be set on files when they are written; this is served up in the "Content-Encoding" HTTP header when reading objects back in.

This is useful for people loading the data into other tools in the AWS ecosystem which don't use file extensions to infer compression type (e.g. serving compressed files from S3 or importing into RDS)

Contributed by: Holden Karau

Change-Id: Ice0da75b516370f51f79e45f391d46c5c7aa4ce4
2022-03-23 20:05:28 +00:00
Steve Loughran
105e0dbd92
HADOOP-13704. Optimized S3A getContentSummary()
Optimize the scan for s3 by performing a deep tree listing,
inferring directory counts from the paths returned.

Contributed by Ahmar Suhail.

Change-Id: I26ffa8c6f65fd11c68a88d6e2243b0eac6ffd024
2022-03-22 13:31:13 +00:00
Mukund Thakur
e0619b702a HADOOP-18112: Implement paging during multi object delete. (#4045)
Multi object delete of size more than 1000 is not supported by S3 and 
fails with MalformedXML error. So implementing paging of requests to 
reduce the number of keys in a single request. Page size can be configured
using "fs.s3a.bulk.delete.page.size" 

 Contributed By: Mukund Thakur
2022-03-11 13:16:51 +05:30
Mehakmeet Singh
909048d87d
HADOOP-18150. Fix ITestAuditManagerDisabled test in S3A. (#4044)
Contributed by Mehakmeet Singh

Change-Id: I25c10844e4ad64b1fd7af9a02018220a611c85e0
2022-03-03 18:46:28 +00:00
Steve Loughran
088684ec60
HADOOP-18091. S3A auditing leaks memory through ThreadLocal references (#3930)
Adds a new map type WeakReferenceMap, which stores weak
references to values, and a WeakReferenceThreadMap subclass
to more closely resemble a thread local type, as it is a
map of threadId to value.

Construct it with a factory method and optional callback
for notification on loss and regeneration.

 WeakReferenceThreadMap<WrappingAuditSpan> activeSpan =
      new WeakReferenceThreadMap<>(
          (k) -> getUnbondedSpan(),
          this::noteSpanReferenceLost);

This is used in ActiveAuditManagerS3A for span tracking.

Relates to
* HADOOP-17511. Add an Audit plugin point for S3A
* HADOOP-18094. Disable S3A auditing by default.

Contributed by Steve Loughran.

Change-Id: Ibf7bb082fd47298f7ebf46d92f56e80ca9b2aaf8
2022-02-10 12:33:40 +00:00
Joey Krabacher
84de16028d
HADOOP-18114. Documentation correction in assumed_roles.md (#3949)
Fixes typo in hadoop-aws/assumed_roles.md

Contributed by Joey Krabacher

Change-Id: I2b77bd7793ae0433196b77042d5f400d0bcbe745
2022-02-09 10:47:24 +00:00
Petre Bogdan Stolojan
87ff57765a
HADOOP-18085. S3 SDK Upgrade causes AccessPoint ARN endpoint mistranslation (#3902)
Part of HADOOP-17198. Support S3 Access Points.

HADOOP-18068. "upgrade AWS SDK to 1.12.132" broke the access point endpoint
translation.

Correct endpoints should start with "s3-accesspoint.", after SDK upgrade they start with
"s3.accesspoint-" which messes up tests + region detection by the SDK.

Contributed by Bogdan Stolojan

Change-Id: I0c0181628ab803afc39036003777eaec79aa378c
2022-02-04 16:22:24 +00:00
Petre Bogdan Stolojan
a8d7acf1a8
HADOOP-17951. Improve S3A checking of S3 Access Point existence (#3516)
Follow-on to HADOOP-17198. Support S3 Access Points

Contributed by Bogdan Stolojan

Change-Id: I0932476c64e1967eb0cb3e0f00060fac5d2bae72
2022-02-04 16:22:04 +00:00
Petre Bogdan Stolojan
664075f35d
HADOOP-17198. Support S3 Access Points (#3260)
Add support for S3 Access Points. This provides extra security as it
ensures applications are not working with buckets belong to third parties.

To bind a bucket to an access point, set the access point (ap) ARN,
which must be done for each specific bucket, using the pattern

fs.s3a.bucket.$BUCKET.accesspoint.arn = ARN

* The global/bucket option `fs.s3a.accesspoint.required` to
mandate that buckets must declare their access point.
* This is not compatible with S3Guard.

Consult the documentation for further details.

Contributed by Bogdan Stolojan

(this commit contains the changes to TestArnResource from HADOOP-18068,
 "upgrade AWS SDK to 1.12.132" so that it works with the later SDK.)

Change-Id: I3fac213e52ca6ec1c813effb8496c353964b8e1b
2022-02-04 16:21:35 +00:00
Steve Loughran
4fd0389153
HADOOP-18094. Disable S3A auditing by default.
See HADOOP-18091. S3A auditing leaks memory through ThreadLocal references

* Adds a new option fs.s3a.audit.enabled to controls whether or not auditing
is enabled. This is false by default.

* When false, the S3A auditing manager is NoopAuditManagerS3A,
which was formerly only used for unit tests and
during filsystem initialization.

* When true, ActiveAuditManagerS3A is used for managing auditing,
allowing auditing events to be reported.

* updates documentation and tests.

This patch does not fix the underlying leak. When auditing is enabled,
long-lived threads will retain references to the audit managers
of S3A filesystem instances which have already been closed.

Contributed by Steve Loughran.

Change-Id: I671e594cd59e8ca77a1f65be791ad0ae9530b8d9
2022-01-24 14:04:23 +00:00
Steve Loughran
8ccc586af6
HADOOP-17409. Remove s3guard from S3A module (#3534)
Completely removes S3Guard support from the S3A codebase.

If the connector is configured to use any metastore other than
the null and local stores (i.e. DynamoDB is selected) the s3a client
will raise an exception and refuse to initialize.

This is to ensure that there is no mix of S3Guard enabled and disabled
deployments with the same configuration but different hadoop releases
-it must be turned off completely.

The "hadoop s3guard" command has been retained -but the supported
subcommands have been reduced to those which are not purely S3Guard
related: "bucket-info" and "uploads".

This is major change in terms of the number of files
changed; before cherry picking subsequent s3a patches into
older releases, this patch will probably need backporting
first.

Goodbye S3Guard, your work is done. Time to die.

Contributed by Steve Loughran.
2022-01-18 18:04:48 +00:00
Steve Loughran
47ba977ca9
HADOOP-18068. upgrade AWS SDK to 1.12.132 (#3864)
With this update, the versions of key shaded dependencies are

  jackson    2.12.3
  httpclient 4.5.13

This backport patch does not include the TestArn changes needed
for the test to work with this version of the SDK; it is only
to be applied to branches without HADOOP-17198. "Support S3 Access Points".
If that patch is backported later, that test suite MUST be
updated to the latest version.

Contributed by Steve Loughran

Change-Id: I8d2b71781ee8472b16469531f9cd0de32dd3356f
2022-01-18 12:20:12 +00:00
monthonk
7dd8e900f8
HADOOP-14334. S3 SSEC tests to downgrade when running against a mandatory encryption object store (#3870)
Contributed by Monthon Klongklaew

Change-Id: Ib275c9690bbc90170c6a442ded198fe006c20bc1
2022-01-09 18:06:27 +00:00
GuoPhilipse
34c415ca2e
HADOOP-18026. Fix default value of Magic committer (#3723)
Contributed by guophilipse

Change-Id: If915623c76619dd3d3b3bdf989688fa13e56fec1
2021-12-03 16:53:44 +00:00
Steve Loughran
67eaf5aa9f
HADOOP-17979. Add Interface EtagSource to allow FileStatus subclasses to provide etags (#3633)
Contributed by Steve Loughran

Change-Id: I596205d788f623114c12962941445432e2036c34
2021-11-29 16:20:55 +00:00
Chao Sun
e079fa6577 Preparing for 3.3.3 development 2021-11-16 16:02:34 -08:00
Steve Loughran
a68671eaf7
HADOOP-17928. Syncable: S3A to warn and downgrade (#3585)
This switches the default behavior of S3A output streams
to warning that Syncable.hsync() or hflush() have been
called; it's not considered an error unless the defaults
are overridden.

This avoids breaking applications which call the APIs,
at the risk of people trying to use S3 as a safe store
of streamed data (HBase WALs, audit logs etc).

Contributed by Steve Loughran.

Change-Id: I0a02ec1e622343619f147f94158c18928a73a885
2021-11-04 14:41:42 +00:00
Tamas Domok
e7785bb7e5
HADOOP-17974. Import statements in hadoop-aws trigger clover failures. #3572
Contributed by Tamas Domok

Change-Id: I47da62596ce23d71709c65eb493bf656967d4415
2021-10-21 18:43:54 +01:00
Mehakmeet Singh
bd077c3814
HADOOP-17953. S3A: Tests to lookup global or per-bucket configuration for encryption algorithm (#3525)
Followup to S3-CSE work of HADOOP-13887

Contributed by Mehakmeet Singh
2021-10-21 12:03:50 +01:00
Steve Loughran
6f7b45641a
HADOOP-17922. move to fs.s3a.encryption.algorithm - JCEKS integration (#3466)
The ordering of the resolution of new and deprecated s3a encryption options
& secrets is the same when JCEKS and other hadoop credentials stores are used
to store them as when they are in XML files: per-bucket settings always take
priority over global values, even when the bucket-level options use the
old option names.

Contributed by Mehakmeet Singh and Steve Loughran

Change-Id: I871672071efa2eb6b600cb2658fceeef57f658a3
2021-10-05 11:39:43 +01:00
Mehakmeet Singh
769059c2f5
HADOOP-17871. S3A CSE: minor tuning (#3412)
This migrates the fs.s3a-server-side encryption configuration options
to a name which covers client-side encryption too.

fs.s3a.server-side-encryption-algorithm becomes fs.s3a.encryption.algorithm
fs.s3a.server-side-encryption.key becomes fs.s3a.encryption.key

The existing keys remain valid, simply deprecated and remapped
to the new values. If you want server-side encryption options
to be picked up regardless of hadoop versions, use
the old keys.

(the old key also works for CSE, though as no version of Hadoop
with CSE support has shipped without this remapping, it's less
relevant)

Contributed by: Mehakmeet Singh

Change-Id: I51804b21b287dbce18864f0a6ad17126aba2b281
2021-10-05 11:39:25 +01:00
Mehakmeet Singh
abb367aec6
HADOOP-17817.HADOOP-17823. S3A to raise IOE if both S3-CSE and S3Guard enabled (#3239)
S3A S3Guard tests to skip if S3-CSE are enabled (#3263)

    Follow on to
    * HADOOP-13887. Encrypt S3A data client-side with AWS SDK (S3-CSE)

    If the S3A bucket is set up to use S3-CSE encryption, all tests which turn
    on S3Guard are skipped, so they don't raise any exceptions about
    incompatible configurations.

Contributed by Mehakmeet Singh

Change-Id: I9f4188109b56a1f4e5a31fae265d980c5795db1e
2021-10-05 11:38:57 +01:00
Mehakmeet Singh
aee975a136
HADOOP-13887. Support S3 client side encryption (S3-CSE) using AWS-SDK (#2706)
This (big!) patch adds support for client side encryption in AWS S3,
with keys managed by AWS-KMS.

Read the documentation in encryption.md very, very carefully before
use and consider it unstable.

S3-CSE is enabled in the existing configuration option
"fs.s3a.server-side-encryption-algorithm":

fs.s3a.server-side-encryption-algorithm=CSE-KMS
fs.s3a.server-side-encryption.key=<KMS_KEY_ID>

You cannot enable CSE and SSE in the same client, although
you can still enable a default SSE option in the S3 console.

* Filesystem list/get status operations subtract 16 bytes from the length
  of all files >= 16 bytes long to compensate for the padding which CSE
  adds.
* The SDK always warns about the specific algorithm chosen being
  deprecated. It is critical to use this algorithm for ranged
  GET requests to work (i.e. random IO). Ignore.
* Unencrypted files CANNOT BE READ.
  The entire bucket SHOULD be encrypted with S3-CSE.
* Uploading files may be a bit slower as blocks are now
  written sequentially.
* The Multipart Upload API is disabled when S3-CSE is active.

Contributed by Mehakmeet Singh

Change-Id: Ie1a27a036a39db66a67e9c6d33bc78d54ea708a0
2021-10-05 11:37:41 +01:00
Steve Loughran
a2242df10a
HADOOP-17894. CredentialProviderFactory.getProviders() recursion loading JCEKS file from S3A (#3393)
* CredentialProviderFactory to detect and report on recursion.
* S3AFS to remove incompatible providers.
* Integration Test for this.

Contributed by Steve Loughran.

Change-Id: Ia247b3c9fe8488ffdb7f57b40eb6e37c57e522ef
2021-09-08 17:00:20 +01:00
Dongjoon Hyun
8606b2cddd
HADOOP-17869. fs.s3a.connection.maximum should be bigger than fs.s3a.threads.max (#3337).
The value of `fs.s3a.connection.maximum` has been increased to 96

Contributed by Dongjoon Hyun

Change-Id: I9020a2bfd2a67fa7a2ec0598ed9d63e78ee99c73
2021-08-30 18:31:57 +01:00
Steve Loughran
c1ad91e72d
HADOOP-17822. fs.s3a.acl.default not working after S3A Audit feature (#3249)
Fixes the regression caused by HADOOP-17511 by moving where the
option  fs.s3a.acl.default is read -doing it before the RequestFactory
is created.

Adds

* A unit test in TestRequestFactory to verify the ACLs are set
  on all file write operations.
* A new ITestS3ACannedACLs test which verifies that ACLs really
  do get all the way through.
* S3A Assumed Role delegation tokens to include the IAM permission
  s3:PutObjectAcl in the generated role.

Contributed by Steve Loughran

Change-Id: I3abac6a1b9e150b6b6df0af7c2c70093f8f518cb
2021-08-02 15:33:34 +01:00
Steve Loughran
26514b6534 HADOOP-17628. Distcp contract test is really slow with ABFS and S3A; timing out. (#3240)
This patch cuts down the size of directory trees used for
distcp contract tests against object stores, so making
them much faster against distant/slow stores.

On abfs, the test only runs with -Dscale (as was the case for s3a already),
and has the larger scale test timeout.

After every test case, the FileSystem IOStatistics are logged,
to provide information about what IO is taking place and
what it's performance is.

There are some test cases which upload files of 1+ MiB; you can
increase the size of the upload in the option
"scale.test.distcp.file.size.kb" 
Set it to zero and the large file tests are skipped.

Contributed by Steve Loughran.
2021-08-02 12:58:37 +01:00
Bobby Wang
904cdd0b00
HADOOP-17812. NPE in S3AInputStream read() after failure to reconnect to store (#3222)
This improves error handling after multiple failures reading data
-when the read fails and attempts to reconnect() also fail.

Contributed by Bobby Wang.

Change-Id: If17dee395ad6b9b7c738021bad20d0a13eb4011e
2021-08-02 12:58:25 +01:00
Petre Bogdan Stolojan
f2cec5cb88
HADOOP-17139 Re-enable optimized copyFromLocal implementation in S3AFileSystem (#3101)
This work
* Defines the behavior of FileSystem.copyFromLocal in filesystem.md
* Implements a high performance implementation of copyFromLocalOperation
  for S3
* Adds a contract test for the operation: AbstractContractCopyFromLocalTest
* Implements the contract tests for Local and S3A FileSystems

Contributed by: Bogdan Stolojan

Change-Id: I25d502102775c3626c4264e5a14c649879730050
2021-08-02 11:58:36 +01:00
Petre Bogdan Stolojan
e89d30b6b7
HADOOP-17458. S3A to treat "SdkClientException: Data read has a different length than the expected" as EOFException (#3040)
Some network exceptions can raise SdkClientException with message
`Data read has a different length than the expected`.

These should be recoverable.

Contributed by Bogdan Stolojan

Change-Id: Ia22fd77d90971e9e02b4f947398a4749eebe5909
2021-07-23 14:46:59 +01:00
Mehakmeet Singh
14a3e74c5c
HADOOP-17801. No error message reported when bucket doesn't exist in S3AFS (#3202)
Contributed by: Mehakmeet Singh.

Change-Id: I26c2a85ef6bbfd1b8269a23fc44d9a55d7fa091c
2021-07-16 15:36:54 +01:00
Mehakmeet Singh
cd15b0cb8a HADOOP-17803. Remove WARN logging from LoggingAuditor when executing a request outside an audit span (#3207)
Followup to HADOOP-17511. "Add audit/telemetry logging to S3A connector"

Contributed by Mehakmeet Singh
2021-07-16 11:52:37 +01:00
Mehakmeet Singh
f1a14df9e6
HADOOP-17774. S3A bytesRead FS statistic showing twice the correct value (#3144)
Contributed by: Mehakmeet Singh

Change-Id: I3302654ca36474a5f399aa848f88bce4587022d8
2021-07-02 14:13:26 +01:00
Zamil Majdy
80859d714d
HADOOP-17764. S3AInputStream read does not re-open the input stream on the second read retry attempt (#3109)
Contributed by Zamil Majdy.

Change-Id: I680d9c425c920ff1a7cd4764d62e10e6ac78bee4
2021-06-25 20:47:11 +01:00
Steve Loughran
39e6f2d191
HADOOP-17771. S3AFS creation fails "Unable to find a region via the region provider chain." (#3133)
This addresses the regression in Hadoop 3.3.1 where if no S3 endpoint
is set in fs.s3a.endpoint, S3A filesystem creation may fail on
non-EC2 deployments, depending on the local host environment setup.

* If fs.s3a.endpoint is empty/null, and fs.s3a.endpoint.region
  is null, the region is set to "us-east-1".
* If fs.s3a.endpoint.region is explicitly set to "" then the client
  falls back to the SDK region resolution chain; this works on EC2
* Details in troubleshooting.md, including a workaround for Hadoop-3.3.1+
* Also contains some minor restructuring of troubleshooting.md

Contributed by Steve Loughran.

Change-Id: Ife482cff513307cd52d59eec56beac0a33e031f5
2021-06-24 16:38:55 +01:00
Petre Bogdan Stolojan
254d943126
HADOOP-17547 Magic committer to downgrade abort in cleanup if list uploads fails with access denied (#3051)
Contributed by Bogdan Stolojan

Change-Id: I32d6dc4f72087783a3ea12473d11690ac14fe3cb
2021-06-12 17:46:11 +01:00
Steve Loughran
464bbd5b7c
HADOOP-17511. Add audit/telemetry logging to S3A connector (#2807)
The S3A connector supports
"an auditor", a plugin which is invoked
at the start of every filesystem API call,
and whose issued "audit span" provides a context
for all REST operations against the S3 object store.

The standard auditor sets the HTTP Referrer header
on the requests with information about the API call,
such as process ID, operation name, path,
and even job ID.

If the S3 bucket is configured to log requests, this
information will be preserved there and so can be used
to analyze and troubleshoot storage IO.

Contributed by Steve Loughran.

Change-Id: Ic0a105c194342ed2d529833ecc42608e8ba2f258
2021-05-25 12:55:38 +01:00
Mehakmeet Singh
b82a0fa9e6
HADOOP-17705. S3A to add Config to set AWS region (#3020)
The option `fs.s3a.endpoint.region` can be used
to explicitly set the AWS region of a bucket.

This is needed when using AWS Private Link, as
the region cannot be automatically determined.

Contributed by Mehakmeet Singh

Change-Id: I4b52f85d7af0ddd56b2b0505ac0124d4fcc67ca0
2021-05-24 13:13:37 +01:00
Mehakmeet Singh
a786847b8f
HADOOP-17670. S3AFS and ABFS to log IOStats at DEBUG mode or optionally at INFO level in close() (#2963)
When the S3A and ABFS filesystems are closed,
their IOStatistics are logged at debug in the log:

org.apache.hadoop.fs.statistics.IOStatisticsLogging

Set `fs.iostatistics.logging.level` to `info` for the statistics
to be logged at info. (also: `warn` or `error` for even higher
log levels).

Contributed by: Mehakmeet Singh

Change-Id: I56d44ad89fc1c0dd4baf701681834e7fd96c544f
2021-05-24 13:04:20 +01:00
Wei-Chiu Chuang
fa4915fdbb
Preparing for 3.3.2 development 2021-05-19 21:52:37 +08:00
Steve Loughran
e944cc0338
HADOOP-16742. NullPointerException in S3A MultiObjectDeleteSupport
Contributed by Tor Arvid Lund.

Change-Id: Iadfe9b2f355cf373031075bfbe681705a2c65bdc
2021-05-04 16:15:13 +01:00
Steve Loughran
8308aab658
HADOOP-17112. S3A committers can't handle whitespace in paths. (#2953)
Contributed by Krzysztof Adamski.

Change-Id: I2746aabcfeb0fbb138a80b02c4d5bbf2a8cf75da
2021-04-25 18:43:25 +01:00
Steve Loughran
fb71e6c91e
HADOOP-17597. Optionally downgrade on S3A Syncable calls (#2801)
Followup to HADOOP-13327, which changed S3A output stream hsync/hflush calls
to raise an exception.

Adds a new option fs.s3a.downgrade.syncable.exceptions

When true, calls to Syncable hsync/hflush on S3A output streams will
log once at warn (for entire process life, not just the stream), then
increment IOStats with the relevant operation counter

With the downgrade option false (default)
* IOStats are incremented
* The UnsupportedOperationException current raised includes a link to the
  JIRA.

Contributed by Steve Loughran.

Change-Id: I967e077eda1d1a1a3795b4d22e003fe7997b6679
2021-04-24 18:32:39 +01:00
Gabor Bota
1b2bc77923
HADOOP-17454. [s3a] Disable bucket existence check - set fs.s3a.bucket.probe to 0 (#2593)
Also fixes HADOOP-16995. ITestS3AConfiguration proxy tests failures when bucket probes == 0
The improvement should include the fix, because the test would fail by default otherwise.

Change-Id: I9a7e4b5e6d4391ebba096c15e84461c038a2ec59
2021-04-24 18:28:21 +01:00
Mukund Thakur
33f9ceb3cc HADOOP-17136. ITestS3ADirectoryPerformance.testListOperations failing (#2153)
A regression caused by HADOOP-17022: the reduction in LIST calls broken an assertion.

Contributed by Mukund Thakur

Change-Id: Ib9725165906931634567fd1f62a81e3a6ea5620c
2021-04-24 18:28:14 +01:00
Ayush Saxena
9c9b16c957
HADOOP-17531. DistCp: Reduce memory usage on copying huge directories. (#2808). Contributed by Ayush Saxena.
* HADOOP-17531. DistCp: Reduce memory usage on copying huge directories. (#2732).

* HADOOP-17531.Addendum: DistCp: Reduce memory usage on copying huge directories. (#2820)

Signed-off-by: Steve Loughran <stevel@apache.org>
2021-03-27 09:25:25 +05:30
Steve Loughran
a07e3c41ca
HADOOP-13551. AWS metrics wire-up (#2778)
Moves to the builder API for AWS S3 client creation, and
offers a similar style of API to the S3A FileSystem and tests, hiding
the details of which options are client, which are in AWS Conf,
and doing the wiring up of S3A statistics interfaces to the AWS
SDK internals. S3A Statistics, including IOStatistics, should now
count throttling events handled in the AWS SDK itself.

This patch restores endpoint determination by probes to US-East-1
if the client isn't configured with fs.s3a.endpoint.

Explicitly setting the endpoint will save the cost of these probe
HTTP requests.

Contributed by Steve Loughran.

Change-Id: Ifa6caa8ff56369ad30e4fd01a42bc74f7b8b3d6b
2021-03-25 13:59:33 +00:00
Mukund Thakur
4c3324ca1a
HADOOP-17305. Fix ITestCustomSigner to work with s3 compatible endpoints (#2395)
Contributed by Mukund Thakur

Change-Id: Ia5def405056691c349cf05530fd3172047d2058b
2021-03-25 13:59:33 +00:00
Steve Loughran
9bbf1f87c9
HADOOP-17476. ITestAssumeRole.testAssumeRoleBadInnerAuth failure. (#2777)
Contributed by Steve Loughran.

Change-Id: Ie96ca99f5d91e5a6aaea4cae4c2e850de9fddb01
2021-03-24 16:49:41 +00:00