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  1. Couchbase Server
  2. MB-32780

goxdcr exit with status 2 and panic

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 6.5.0
    • 6.5.0
    • XDCR
    • Untriaged
    • No

    Description

      Build 6.5.0-2082

      In high bucket density test(with 30 buckets) with replication on, we observed that goxdcr process on source cluster kv node exit multiple times with status 2 and below panic.
      This happened when we hard failed over one kv node and started rebalance without adding that node back in cluster.
      Destination cluster does not show any errors.

      Logs of KV nodes in source cluster:
      https://s3.amazonaws.com/bugdb/jira/mh_high_bkt_density_failover/collectinfo-2019-01-23T055648-ns_1%40172.23.97.12.zip
      https://s3.amazonaws.com/bugdb/jira/mh_high_bkt_density_failover/collectinfo-2019-01-23T055648-ns_1%40172.23.97.13.zip

      Panic:

      Service 'goxdcr' exited with status 2. Restarting. Messages:
       2019-01-22T22:39:17.343-08:00 INFO GOXDCR.DcpNozzle: dcp_a5944500fffd312188a4487bf14b5802/bucket-7/bucket-7_172.23.97.13:11210_0: startUprStreams for [87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427]...
       panic: runtime error: invalid memory address or nil pointer dereference
       [signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x83aa0e]

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            neil.huang Neil Huang added a comment -

            Hi Mahesh Mandhare, the links you provided are not working, and the log you pasted does not contain the stack trace with the line numbers that are used for debugging.

            Can you please re-upload the logs, or reproduce it if you could?

            Thanks.

            neil.huang Neil Huang added a comment - Hi Mahesh Mandhare , the links you provided are not working, and the log you pasted does not contain the stack trace with the line numbers that are used for debugging. Can you please re-upload the logs, or reproduce it if you could? Thanks.

            Neil Huang, Logs might have archived, if this gets reproduced again I will upload logs.

            mahesh.mandhare Mahesh Mandhare (Inactive) added a comment - Neil Huang , Logs might have archived, if this gets reproduced again I will upload logs.
            neil.huang Neil Huang added a comment -

            Thanks Mahesh Mandhare.

            Panic stack captured as

             

            2019-03-26T13:52:53.783-07:00 INFO GOXDCR.DcpNozzle: dcp_cedc75bae135a16e6bf1d940cff71197/bucket-10/bucket-10_172.23.97.12:11210_0: startUprStreams for [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511]...
            panic: runtime error: invalid memory address or nil pointer dereference
            [signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x92f7a1]
             
            goroutine 83265212 [running]:
            github.com/couchbase/goxdcr/parts.(*dcpStreamReqHelper).getNewVersion(0x0, 0xc04ab77c50)
                    /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:107 +0x31
            github.com/couchbase/goxdcr/parts.(*DcpNozzle).startUprStream(0xc002cc63c0, 0x101cf, 0xc034125fb0, 0x0, 0x0)
                    /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:1028 +0x67
            github.com/couchbase/goxdcr/parts.(*DcpNozzle).startUprStreams_internal(0xc002cc63c0, 0xc04457b200, 0x100, 0x100, 0x100, 0x100)
                    /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:984 +0xdb
            github.com/couchbase/goxdcr/parts.(*DcpNozzle).startUprStreams(0xc002cc63c0, 0x0, 0x0)
                    /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:944 +0x30a
            created by github.com/couchbase/goxdcr/parts.(*DcpNozzle).Start
                    /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:564 +0x421
            

            neil.huang Neil Huang added a comment - Thanks Mahesh Mandhare . Panic stack captured as   2019-03-26T13:52:53.783-07:00 INFO GOXDCR.DcpNozzle: dcp_cedc75bae135a16e6bf1d940cff71197/bucket-10/bucket-10_172.23.97.12:11210_0: startUprStreams for [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511]... panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x92f7a1]   goroutine 83265212 [running]: github.com/couchbase/goxdcr/parts.(*dcpStreamReqHelper).getNewVersion(0x0, 0xc04ab77c50) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:107 +0x31 github.com/couchbase/goxdcr/parts.(*DcpNozzle).startUprStream(0xc002cc63c0, 0x101cf, 0xc034125fb0, 0x0, 0x0) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:1028 +0x67 github.com/couchbase/goxdcr/parts.(*DcpNozzle).startUprStreams_internal(0xc002cc63c0, 0xc04457b200, 0x100, 0x100, 0x100, 0x100) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:984 +0xdb github.com/couchbase/goxdcr/parts.(*DcpNozzle).startUprStreams(0xc002cc63c0, 0x0, 0x0) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:944 +0x30a created by github.com/couchbase/goxdcr/parts.(*DcpNozzle).Start /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:564 +0x421

            Build couchbase-server-6.5.0-2797 contains goxdcr commit e1ddb67 with commit message:
            MB-32780 - do not delete vbHanshakeHelper as part of DCP nozzle stop to avoid panic in case start() lags

            build-team Couchbase Build Team added a comment - Build couchbase-server-6.5.0-2797 contains goxdcr commit e1ddb67 with commit message: MB-32780 - do not delete vbHanshakeHelper as part of DCP nozzle stop to avoid panic in case start() lags

            Mahesh Mandhare can you please close this one out?

            arunkumar Arunkumar Senthilnathan added a comment - Mahesh Mandhare can you please close this one out?

            Build 6.5.0-4744

            When we hard failover kv node and rebalance we do not see this error in high bucket density test, but rebalance fails with MB-34911

            Will reopen this ticket if we see this panic gain.

            mahesh.mandhare Mahesh Mandhare (Inactive) added a comment - Build 6.5.0-4744 When we hard failover kv node and rebalance we do not see this error in high bucket density test, but rebalance fails with  MB-34911 Will reopen this ticket if we see this panic gain.

            People

              mahesh.mandhare Mahesh Mandhare (Inactive)
              mahesh.mandhare Mahesh Mandhare (Inactive)
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                Resolved:

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