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5b97cb70a0
Introduce a ScannerStartupDelay configuration to enable WAL write-only recovery, allowing fence messages to be persisted during primary–secondary switchover when the StreamingNode is trapped in crash loops. issue: https://github.com/milvus-io/milvus/issues/46368 <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Added a configurable WAL scanner pause/resume and a consumer request flag to optionally ignore pause signals. * **Metrics** * Added a scanner pause gauge and pause-duration tracking for WAL scanning. * **Tests** * Added coverage for pause-consumption behavior and cleanup in stream client tests. * **Chores** * Consolidated flush-all logging into a single field and added a helper for bulk message conversion. <sub>✏️ Tip: You can customize this high-level summary in your review settings.</sub> <!-- end of auto-generated comment: release notes by coderabbit.ai --> --------- Signed-off-by: bigsheeper <yihao.dai@zilliz.com>
51 lines
1.8 KiB
Go
51 lines
1.8 KiB
Go
package wal
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import (
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"github.com/cockroachdb/errors"
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"github.com/milvus-io/milvus/pkg/v2/streaming/util/message"
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"github.com/milvus-io/milvus/pkg/v2/streaming/util/options"
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"github.com/milvus-io/milvus/pkg/v2/streaming/util/types"
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)
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type MessageFilter = func(message.ImmutableMessage) bool
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var ErrUpstreamClosed = errors.New("upstream closed")
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// ReadOption is the option for reading records from the wal.
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type ReadOption struct {
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VChannel string // vchannel is a optional field to select a vchannel to consume.
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// If the vchannel is setup, the message that is not belong to these vchannel will be dropped by scanner.
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// Otherwise all message on WAL will be sent.
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DeliverPolicy options.DeliverPolicy
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MessageFilter []options.DeliverFilter
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MesasgeHandler message.Handler // message handler for message processing.
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// If the message handler is nil (no redundant operation need to apply),
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// the default message handler will be used, and the receiver will be returned from Chan.
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// Otherwise, Chan will panic.
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// vaild every message will be passed to this handler before being delivered to the consumer.
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// IgnorePauseConsumption is the flag to ignore the consumption pause of the scanner.
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IgnorePauseConsumption bool
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}
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// Scanner is the interface for reading records from the wal.
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type Scanner interface {
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// Chan returns the channel of message if Option.MessageHandler is nil.
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Chan() <-chan message.ImmutableMessage
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// Channel returns the channel assignment info of the wal.
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Channel() types.PChannelInfo
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// Error returns the error of scanner failed.
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// Will block until scanner is closed or Chan is dry out.
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Error() error
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// Done returns a channel which will be closed when scanner is finished or closed.
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Done() <-chan struct{}
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// Close the scanner, release the underlying resources.
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// Return the error same with `Error`
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Close() error
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}
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